Re: hardware RAID1 NVMe card?

2022-07-06 Thread Chris Murphy
On Thu, Jun 23, 2022 at 11:05 PM ToddAndMargo via users
 wrote:
>
> Hi All,
>
> Any of you guys know of a PCIe card that will do
> hardware RAID 1 with two NVMe drives?
>
> I have found some, but they are way to elaborate,
> and as such, way too expensive.

I'm  really not certain how sophisticated or reliable either PCIe or
NVMe is with respect to error reporting. Or even if it varies by
make/model. My understanding is that internally it has to be good
because your data isn't really stored in any recognizable form on
solid state drives, it's a "probabilistic representation of your data"
and requires really sophisticated encoding/decoding to "almost
certainly" return your data. But when that doesn't happen, curiously
it (anecdotally) seems rare to get discrete read errors like we see
with hard drives. Common instead, the drive returns garbage or zeros
instead of your data. This is where btrfs shines, in general, but
really shines in the raid1 configuration.

In the normal single drive configuration, Btrfs will verbosely
complain. It has limited ability to correct when the metadata profile
is dup (two copies of the file system on one drive), which is the mkfs
default since btrfs-progs ~5.15. For various reasons, even dup might
have two bad copies on a single SSD.

But in the raid1 configuration (two copies on different devices),
Btrfs can unambiguously determine on every read whether data or
metadata is wrong, and grab the good copy from the other drive, and
overwrite the bad copy. And this is all automatic. You can see the
same scary verbose message in dmesg, but you'll see additional
messages for the fixups. Fixup also happens during scrub, useful for
the areas that aren't regularly read.

Conversely, any hardware, mdadm, or LVM RAID depends on the hardware
reporting a read error. If garbage or zeros are returned, the RAID
can't do anything about it. [1]

Sounds great. So why not btrfs raid1? Well, right now the code that
handles degraded mdadm RAID is all in dracut (in the initramfs). The
initramfs contains dracut scripts that try to assemble the RAID and if
a drive is missing, it won't assemble, so the scripts know to start a
loop to wait for about 3 minutes, and then attempt a degraded
assemble. But dracut doesn't handle Btrfs in the same situation, and
no one has done the work so far to make it possible. If a drive flat
out dies, what happens at boot time is you get an indefinite wait for
the device to appear, because of a udev rule that requires waiting for
all Btrfs devices to appear before mount is attempted. That's good
because we don't want to prematurely try to do a normal or degraded
mount. Anyway, this area needs development work. So if your use case
requires unattended boot when a drive has failed, this set up is not
for you.

So those are the current trade offs.

[1] There's experimental dm-integrity support via cryptsetup. It works
rather differently than Btrfs, but has the ability to detect such
corruption problems and report them to the upper layer as a read error
where the normal RAID error correction can then work properly.


-- 
Chris Murphy
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-07-04 Thread ToddAndMargo via users

On 6/23/22 20:04, ToddAndMargo via users wrote:

Hi All,

Any of you guys know of a PCIe card that will do
hardware RAID 1 with two NVMe drives?

I have found some, but they are way to elaborate,
and as such, way too expensive.

Many thanks,
-T


Hi All,

The one I finally landed on was the High Point SSD 7202.
This is a complication of questions I asked High Point.

Thank you all for the help and tips!

-T


High Point SSD7202 Hardware RAID Card Q:

Product page:
https://www.highpoint-tech.com/gen3-nvme-m2-bootable


1) Is the SSD7202 EUFI bootable?
   Yes


2) What is the warranty?
   Two years.

   Note: they do not perform out of waranty repainrs for a fee.  But
 they do give customer loyalty discoutns


3) What is the life expectancy (in years) of the cooling fan?
   70,000 continuous at 40C

   Fan spec's:

https://u.pcloud.link/publink/show?code=XZk5lLVZ76OQcrkuio4kkNFfkTLXvQy5IpyX


4) Is the cooling fan replaceable?
   "Supposedly"  (Details were not forthcoming)


5) Does this work on Windows 11?
   Yes, SSD7202 supports windows 11.


6) Is there a configuration utility at boot?
   Yes, at UEFI.


7) Is there a Windows 11 utility to manage the 7202?
 https://www.highpoint-tech.com/gen3-nvme-m2-bootable
 Click on the "Downloads" tab. Look for the "Software 
Downloads" Title



8) Is there Linux support?
 https://www.highpoint-tech.com/gen3-nvme-m2-bootable
 Click on the "Linux Updates" tab.

 As of 2022-07-02:
  CentOS 8.3/8.2/8.1/7.7/7.8/7.9
  Debian 10.4.0/10.5.0/10.6.0/10.7.0/10.8.0
  Ubuntu 20.10 / 20.04 / 18.04
  Red Hat 8.3/8.4


9) Where is the driver download page?
 https://www.highpoint-tech.com/gen3-nvme-m2-bootable
 Click on the "Downloads" tab. Look for the "Software 
Downloads" Title



10) Where is the manual download page?
 https://www.highpoint-tech.com/gen3-nvme-m2-bootable
 Click on the "Downloads" tab.  Look for the "Documentation" Title


11)  Is the configuration information for the RAID volume on the drive
 itself or on the card?

The configuration information of the raid volume is on the drive,
and the card supports raid roaming.   Data will not be lost as
long as the drive is not damaged.
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-07-02 Thread Patrick Mansfield via users
On Fri, Jun 24, 2022 at 08:35:31AM -0400, John Mellor wrote:
> On 2022-06-23 23:04, ToddAndMargo via users wrote:
> > Any of you guys know of a PCIe card that will do
> > hardware RAID 1 with two NVMe drives?
> > 
> > I have found some, but they are way to elaborate,
> > and as such, way too expensive.
> 
> Maybe you have a weird hardware requirement that explains the question, but
> why do you want a RAID-1 card?� Software RAID is much cheaper, faster, uses
> less power and is considerably more reliable.� If you run BTRFS or ZFS, then
> it is also easier on the drives, and recovery times are hundreds of times
> lower than what you can do with hardware.� That translates directly into
> hundreds of times better reliability numbers.� Best of all, you do not need
> matching drives or drive sizes to implement RAID-1.� For a long time now,
> the only reason to run hardware RAID has been underneath back-level versions
> of Windows or VMware.

When I last tried about two years ago, using RAID-5 via LVM with no file system
I was unable to come close to maximum performance for sequential only writes,
where you do not need to read data off of the disks - it was still reading and
writing.

I couldn't find any details on how to get this to work or if it was possible.

I tried tuning various settings (I can't recall specifics, but generally
increasing the memory it uses) but with little change in performance.

-- Patrick
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread Roger Heflin
Odds are with a bit of work you can find the start of the dara and  so that
you can mount it.  Witb raid1 it should be doable.  With raid5/6 you need
to know details about the algorithm used by the card.  I think there is a
disk scanning tool that can be used to find the lvm and or fs header and
from that you could use dmsetup to create a device srarting at the right
spot for the header to work (without putting a partition on the device).
 I use software raid just so i do not need the same type of raid card to
read it on a new or repaired system

On Fri, Jun 24, 2022, 10:38 AM ToddAndMargo via users <
users@lists.fedoraproject.org> wrote:

> On 6/24/22 11:16, Mauricio Tavares wrote:
> > On Fri, Jun 24, 2022 at 2:10 PM ToddAndMargo via users
> >  wrote:
> >>
> >> On 6/24/22 10:42, Roger Heflin wrote:
> >>> Raid cards of different brands wont typically read each others configs.
> >>> So any replacement card would need to be the same card, or maybe just
> >>> manufacturer to read the current config and disks.
> >>
> >>
> >> Yikes!
> >
> >With that said, there are really not many makes of cards. And
> > their cards are usually based on the same model. Other cards are
> > really not true hardware raid controllers. You can find out by getting
> > the model number from lspci.
>
> And there is always Drive Savers
>
> https://drivesaversdatarecovery.com/
> ___
> users mailing list -- users@lists.fedoraproject.org
> To unsubscribe send an email to users-le...@lists.fedoraproject.org
> Fedora Code of Conduct:
> https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives:
> https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
> Do not reply to spam on the list, report it:
> https://pagure.io/fedora-infrastructure
>
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread ToddAndMargo via users

On 6/24/22 11:16, Mauricio Tavares wrote:

On Fri, Jun 24, 2022 at 2:10 PM ToddAndMargo via users
 wrote:


On 6/24/22 10:42, Roger Heflin wrote:

Raid cards of different brands wont typically read each others configs.
So any replacement card would need to be the same card, or maybe just
manufacturer to read the current config and disks.



Yikes!


   With that said, there are really not many makes of cards. And
their cards are usually based on the same model. Other cards are
really not true hardware raid controllers. You can find out by getting
the model number from lspci.


And there is always Drive Savers

https://drivesaversdatarecovery.com/
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread Mauricio Tavares
On Fri, Jun 24, 2022 at 2:10 PM ToddAndMargo via users
 wrote:
>
> On 6/24/22 10:42, Roger Heflin wrote:
> > Raid cards of different brands wont typically read each others configs.
> > So any replacement card would need to be the same card, or maybe just
> > manufacturer to read the current config and disks.
>
>
> Yikes!

  With that said, there are really not many makes of cards. And
their cards are usually based on the same model. Other cards are
really not true hardware raid controllers. You can find out by getting
the model number from lspci.

> ___
> users mailing list -- users@lists.fedoraproject.org
> To unsubscribe send an email to users-le...@lists.fedoraproject.org
> Fedora Code of Conduct: 
> https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives: 
> https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
> Do not reply to spam on the list, report it: 
> https://pagure.io/fedora-infrastructure
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread ToddAndMargo via users

On 6/24/22 10:42, Roger Heflin wrote:
Raid cards of different brands wont typically read each others configs. 
So any replacement card would need to be the same card, or maybe just 
manufacturer to read the current config and disks.



Yikes!
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread Roger Heflin
Raid cards of different brands wont typically read each others configs.  So
any replacement card would need to be the same card, or maybe just
manufacturer to read the current config and disks.

On Fri, Jun 24, 2022, 4:40 AM ToddAndMargo via users <
users@lists.fedoraproject.org> wrote:

> On 6/24/22 05:35, John Mellor wrote:
> > On 2022-06-23 23:04, ToddAndMargo via users wrote:
> >> Any of you guys know of a PCIe card that will do
> >> hardware RAID 1 with two NVMe drives?
> >>
> >> I have found some, but they are way to elaborate,
> >> and as such, way too expensive.
> >
> > Maybe you have a weird hardware requirement that explains the question,
> > but why do you want a RAID-1 card?  Software RAID is much cheaper,
> > faster, uses less power and is considerably more reliable.  If you run
> > BTRFS or ZFS, then it is also easier on the drives, and recovery times
> > are hundreds of times lower than what you can do with hardware.  That
> > translates directly into hundreds of times better reliability numbers.
> > Best of all, you do not need matching drives or drive sizes to implement
> > RAID-1.  For a long time now, the only reason to run hardware RAID has
> > been underneath back-level versions of Windows or VMware.
> >
> > --
> >
> > John Mellor
>
> Hi John,
>
> I am working with a customer's motherboard where
> iRSTe is defective.  So I just want to chuck it and
> get hardware RAID,
>
> Otherwise, you are correct.
>
> -T
> ___
> users mailing list -- users@lists.fedoraproject.org
> To unsubscribe send an email to users-le...@lists.fedoraproject.org
> Fedora Code of Conduct:
> https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives:
> https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
> Do not reply to spam on the list, report it:
> https://pagure.io/fedora-infrastructure
>
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread ToddAndMargo via users

On 6/24/22 09:24, Mauricio Tavares wrote:

On Thu, Jun 23, 2022 at 11:05 PM ToddAndMargo via users
 wrote:


Hi All,

Any of you guys know of a PCIe card that will do
hardware RAID 1 with two NVMe drives?

I have found some, but they are way to elaborate,
and as such, way too expensive.

Many thanks,
-T


   Which NVMe style drives: U2 or M2?


M.2: Samsung 980's
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread Mauricio Tavares
On Thu, Jun 23, 2022 at 11:05 PM ToddAndMargo via users
 wrote:
>
> Hi All,
>
> Any of you guys know of a PCIe card that will do
> hardware RAID 1 with two NVMe drives?
>
> I have found some, but they are way to elaborate,
> and as such, way too expensive.
>
> Many thanks,
> -T

  Which NVMe style drives: U2 or M2?

I have used LSI, the Dell controllers (which can run in other Linux
boxes), and Areca, primarily on the U2 format. It depends on how
comfortable you are, but I have found PCIe controllers that worked
fine on ebay. In fact, I even got a NVMe hotswap cage before.

> ___
> users mailing list -- users@lists.fedoraproject.org
> To unsubscribe send an email to users-le...@lists.fedoraproject.org
> Fedora Code of Conduct: 
> https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives: 
> https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
> Do not reply to spam on the list, report it: 
> https://pagure.io/fedora-infrastructure
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread ToddAndMargo via users

On 6/24/22 08:09, George N. White III wrote:
On Fri, Jun 24, 2022 at 12:05 AM ToddAndMargo via users 
mailto:users@lists.fedoraproject.org>> 
wrote:


Hi All,

Any of you guys know of a PCIe card that will do
hardware RAID 1 with two NVMe drives?

I have found some, but they are way to elaborate,
and as such, way too expensive.


I expect the market for hardware RAID cards that don't improve on
software RAID is too small to be commercially viable.


Ya, no fooling.  This is also what I am finding.

I have been looking at the

https://www.highpoint-tech.com/product-page/ssd7202

But am loath to pay $300 for it.

I am going to try clearing the cmos on this
motherboard and starting fresh to see it
the iRSTe finally wakes up



___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread R. G. Newbury

On 2022-06-24 ToddAndMargo
Any of you guys know of a PCIe card that will do
hardware RAID 1 with two NVMe drives?

I have found some, but they are way to elaborate,
and as such, way too expensive.


Asus makes the UltraQuad board. Asrock make the QuadUltra board.
Both hold 4 nvme drives and can raid.
Both use only one x16 slot.

You need a BIOS that can split your PCIE x16 into 4x4x4x4 for best 
performance. That means at least a X299 or better chipset. The Asus (at 
least) can boot from the raid array.

Both are priced just under $100 last time I looked.

Geoff
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread George N. White III
On Fri, Jun 24, 2022 at 12:05 AM ToddAndMargo via users <
users@lists.fedoraproject.org> wrote:

> Hi All,
>
> Any of you guys know of a PCIe card that will do
> hardware RAID 1 with two NVMe drives?
>
> I have found some, but they are way to elaborate,
> and as such, way too expensive.
>

I expect the market for hardware RAID cards that don't improve on
software RAID is too small to be commercially viable.

-- 
George N. White III
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread ToddAndMargo via users

On 6/24/22 05:35, John Mellor wrote:

On 2022-06-23 23:04, ToddAndMargo via users wrote:

Any of you guys know of a PCIe card that will do
hardware RAID 1 with two NVMe drives?

I have found some, but they are way to elaborate,
and as such, way too expensive.


Maybe you have a weird hardware requirement that explains the question, 
but why do you want a RAID-1 card?  Software RAID is much cheaper, 
faster, uses less power and is considerably more reliable.  If you run 
BTRFS or ZFS, then it is also easier on the drives, and recovery times 
are hundreds of times lower than what you can do with hardware.  That 
translates directly into hundreds of times better reliability numbers. 
Best of all, you do not need matching drives or drive sizes to implement 
RAID-1.  For a long time now, the only reason to run hardware RAID has 
been underneath back-level versions of Windows or VMware.


--

John Mellor


Hi John,

I am working with a customer's motherboard where
iRSTe is defective.  So I just want to chuck it and
get hardware RAID,

Otherwise, you are correct.

-T
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread Richard Shaw
On Fri, Jun 24, 2022 at 7:35 AM John Mellor  wrote:

> On 2022-06-23 23:04, ToddAndMargo via users wrote:
> > Any of you guys know of a PCIe card that will do
> > hardware RAID 1 with two NVMe drives?
> >
> > I have found some, but they are way to elaborate,
> > and as such, way too expensive.
>
> Maybe you have a weird hardware requirement that explains the question,
> but why do you want a RAID-1 card?  Software RAID is much cheaper,
> faster, uses less power and is considerably more reliable.  If you run
> BTRFS or ZFS, then it is also easier on the drives, and recovery times
> are hundreds of times lower than what you can do with hardware.  That
> translates directly into hundreds of times better reliability numbers.
> Best of all, you do not need matching drives or drive sizes to implement
> RAID-1.  For a long time now, the only reason to run hardware RAID has
> been underneath back-level versions of Windows or VMware.
>

Agreed. I have a 4x4gb Seagate Terrascale drive array running BTRFS in
RAID1. Until it starts to fill up, I'm going to leave it RAID1 while BTRFS
continues to improve RAID5 :)

And then I can convert it on the fly!

Thanks,
Richard
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure


Re: hardware RAID1 NVMe card?

2022-06-24 Thread John Mellor

On 2022-06-23 23:04, ToddAndMargo via users wrote:

Any of you guys know of a PCIe card that will do
hardware RAID 1 with two NVMe drives?

I have found some, but they are way to elaborate,
and as such, way too expensive.


Maybe you have a weird hardware requirement that explains the question, 
but why do you want a RAID-1 card?  Software RAID is much cheaper, 
faster, uses less power and is considerably more reliable.  If you run 
BTRFS or ZFS, then it is also easier on the drives, and recovery times 
are hundreds of times lower than what you can do with hardware.  That 
translates directly into hundreds of times better reliability numbers.  
Best of all, you do not need matching drives or drive sizes to implement 
RAID-1.  For a long time now, the only reason to run hardware RAID has 
been underneath back-level versions of Windows or VMware.


--

John Mellor
___
users mailing list -- users@lists.fedoraproject.org
To unsubscribe send an email to users-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure