On 07/05/15 03:51, Jeff Siddall wrote:
> On 05/06/2015 09:33 PM, ToddAndMargo wrote:
>> Thank you. I will have to get over my phobia of software
>> RAID.
>
> FWIW I have used SW RAID1 for years (maybe decades by now) on all sorts
> of systems. It has saved me many times and never burned me.
>
>
Hi ToddAndMargo!
On 2015.05.06 at 23:45:41 -0700, ToddAndMargo wrote next:
> >Many thanks,
> >-T
> >
>
>
> Not to ask too stupid a question, but would a hybrid drive,
> such as
>
> http://www.seagate.com/internal-hard-drives/solid-state-hybrid/desktop-solid-state-hybrid-drive/?sku=ST2000DX001
Hi Kevin K!
On 2015.05.06 at 18:52:42 -0500, Kevin K wrote next:
> > On May 6, 2015, at 6:31 PM, Vladimir Mosgalin
> > wrote:
> >
> > Alternative to TRIM-aided GC is Idle Time Garbage Collection (which you
> > could see on Plextor), which actively scans data in background, finds
> > empty blo
On 04/10/2015 05:21 PM, ToddAndMargo wrote:
Hi All,
I have a customer interested in high end workstation. She wants RAID 1
to protect her drives. She is also interested in Solid State Drives.
(And she knows the difference between RAID and Backup.)
What host controller would you guys recommend f
On 05/06/2015 09:33 PM, ToddAndMargo wrote:
Thank you. I will have to get over my phobia of software
RAID.
FWIW I have used SW RAID1 for years (maybe decades by now) on all sorts
of systems. It has saved me many times and never burned me.
If you are going to do anything in SW RAID1 is as e
On 05/06/2015 05:22 PM, Konstantin Olchanski wrote:
On Wed, May 06, 2015 at 04:46:27PM -0700, ToddAndMargo wrote:
... that I ... get the most reliable SSD I can find and talk
the customer out of RAID.
This is bad thinking. "most reliable" does not mean "will never fail".
(leaving aside the
On Wed, May 06, 2015 at 04:46:27PM -0700, ToddAndMargo wrote:
>
> ... that I ... get the most reliable SSD I can find and talk
> the customer out of RAID.
>
This is bad thinking. "most reliable" does not mean "will never fail".
(leaving aside the question on how you can tell which brand is more
> On May 6, 2015, at 6:31 PM, Vladimir Mosgalin
> wrote:
>
> Alternative to TRIM-aided GC is Idle Time Garbage Collection (which you
> could see on Plextor), which actively scans data in background, finds
> empty blocks (zeroes) and marks them as free. Well probably more
> complicated than that
On 05/06/2015 04:31 PM, Vladimir Mosgalin wrote:
Hi ToddAndMargo!
On 2015.05.05 at 23:05:36 -0700, ToddAndMargo wrote next:
Hi Vladimir,
I have look all over Intel's specs for their new SSD DC S3510
series SSDs (older drives are harder to find):
http://www.intel.com/content/www/us/en/solid
On 05/06/2015 04:32 PM, Vladimir Mosgalin wrote:
Hi ToddAndMargo!
On 2015.05.06 at 00:48:30 -0700, ToddAndMargo wrote next:
http://www.intel.ie/content/dam/www/public/us/en/documents/white-papers/ssd-dc-s3500-workload-raid-paper.pdf
The system used for RAID 1 testing include the foll
Hi ToddAndMargo!
On 2015.05.06 at 00:48:30 -0700, ToddAndMargo wrote next:
> http://www.intel.ie/content/dam/www/public/us/en/documents/white-papers/ssd-dc-s3500-workload-raid-paper.pdf
>
>
> The system used for RAID 1 testing include the following:
> • LSI MegaRAID 9265-8i* controller
Hi ToddAndMargo!
On 2015.05.05 at 23:05:36 -0700, ToddAndMargo wrote next:
> Hi Vladimir,
>
> I have look all over Intel's specs for their new SSD DC S3510
> series SSDs (older drives are harder to find):
>
> http://www.intel.com/content/www/us/en/solid-state-drives/ssd-dc-s3510-spec.html
>
> Th
On 05/05/2015 11:05 PM, ToddAndMargo wrote:
On 04/14/2015 02:29 AM, Vladimir Mosgalin wrote:
Hi ToddAndMargo!
On 2015.04.13 at 18:26:49 -0700, ToddAndMargo wrote next:
-T
Wonder if there are any enterprise level SSD's that don't
need TRIM?
Tons. All Hitachi SSDs, OCZ Interpid and Saber,
On 04/14/2015 02:29 AM, Vladimir Mosgalin wrote:
Hi ToddAndMargo!
On 2015.04.13 at 18:26:49 -0700, ToddAndMargo wrote next:
-T
Wonder if there are any enterprise level SSD's that don't
need TRIM?
Tons. All Hitachi SSDs, OCZ Interpid and Saber, all Intel DC series SSDs
(based on Intel cont
On Mon, Apr 13, 2015 at 03:28:39PM -0700, jdow wrote:
> The 3Ware RAID cards I have vastly outstrip the motherboard built in
> Intel RAID implementations for a RAID 5 setup. (I don't consider
> RAID 1 to be economically sensible for most uses.) A four disk RAID
> 5 SSD configuration can be breathta
On Mon, Apr 13, 2015 at 10:02:15PM -0400, Nico Kadel-Garcia wrote:
>
> Been there, done that. Don't have to make this stuff up, I spent some
> time *designing* Linux based storage servers, but it was more than 5
> years ago.
>
Yes, much has changed in 5 years. Some improvements. Bootable RAID1 o
On Tue, Apr 14, 2015 at 12:29:41PM +0300, Vladimir Mosgalin wrote:
>
> ... (e.g. 100 TB endurance of normal SSD vs 20 PB endurance of enterprise SSD)
>
These are numbers from vendors. Data on actual performance as seen by end users
is much harder to come by.
For HDDs, we have periodic reports fr
On Tue, Apr 14, 2015 at 12:55:14PM +0200, David Sommerseth wrote:
>
> What I've not seen discussed here is the purpose of using RAID1. I
> guess it is related to avoid data loss in case one drive dies. The
> other thing I'm guessing is that SSD is wanted due to the performance.
>
Correcto. SSD
On Tue, Apr 14, 2015 at 06:39:52PM +0300, Vladimir Mosgalin wrote:
>
> > Considering that the RAID technology is old which was designed for
> > rotating media, maybe that isn't the the best solution for SSD?
>
With SSD, there is still possibility of single-disk failure (SSD bricks itself).
When
Hi David Sommerseth!
On 2015.04.14 at 12:55:14 +0200, David Sommerseth wrote next:
> Considering that the RAID technology is old which was designed for
> rotating media, maybe that isn't the the best solution for SSD?
> I'm wondering ... maybe another (possibly better?) approach would be
> dm-ca
On 11/04/15 02:21, ToddAndMargo wrote:
> Hi All,
>
> I have a customer interested in high end workstation. She wants RAID 1
> to protect her drives. She is also interested in Solid State Drives.
> (And she knows the difference between RAID and Backup.)
>
> What host controller would you guys reco
>
> From: Nico Kadel-Garcia
>To: Nico Kadel-Garcia ; James M. Pulver
>; "scientific-linux-users@fnal.gov"
>
>Sent: Tuesday, 14 April 2015, 3:02
>Subject: Re: need SSD RAID controller advice
>
>
>On Mon, Apr 1
Hi ToddAndMargo!
On 2015.04.13 at 18:26:49 -0700, ToddAndMargo wrote next:
> -T
>
> Wonder if there are any enterprise level SSD's that don't
> need TRIM?
Tons. All Hitachi SSDs, OCZ Interpid and Saber, all Intel DC series SSDs
(based on Intel controllers) and many more. Though I'm not sure th
On Mon, Apr 13, 2015 at 8:16 PM, Konstantin Olchanski
wrote:
> On Mon, Apr 13, 2015 at 07:29:18PM -0400, Nico Kadel-Garcia wrote:
>> > I am not sure what you refer to. With SL5 and SL6 you have 2 disks,
>> > put "/" on a software RAID1 partitions put grub on both disks ...
>>
>> Until it fails. Gr
On 04/10/2015 05:21 PM, ToddAndMargo wrote:
Hi All,
I have a customer interested in high end workstation. She wants RAID 1
to protect her drives. She is also interested in Solid State Drives.
(And she knows the difference between RAID and Backup.)
What host controller would you guys recommend f
On 04/13/2015 12:02 PM, Konstantin Olchanski wrote:
host controller
Since you do not say that "hardware raid is required", I assume linux software
raid is acceptable?
"Host Controller" only
On Mon, Apr 13, 2015 at 07:29:18PM -0400, Nico Kadel-Garcia wrote:
> > I am not sure what you refer to. With SL5 and SL6 you have 2 disks,
> > put "/" on a software RAID1 partitions put grub on both disks ...
>
> Until it fails. Grubby, along with the kernel installlation RPM,
> doesn't know how to
From:"Nico Kadel-Garcia"
Date:Tue, 14 Apr, 2015 at 0:29
Subject:Re: need SSD RAID controller advice
On Mon, Apr 13, 2015 at 3:10 PM, Konstantin Olchanski
wrote:
> On Mon, Apr 13, 2015 at 08:25:51AM -0400, Nico Kadel-Garcia wrote:
>> On Mon, Apr 13, 2015 at 8:10 AM, Jam
On Mon, Apr 13, 2015 at 3:10 PM, Konstantin Olchanski
wrote:
> On Mon, Apr 13, 2015 at 08:25:51AM -0400, Nico Kadel-Garcia wrote:
>> On Mon, Apr 13, 2015 at 8:10 AM, James M. Pulver wrote:
>> > I would point out that I'm not sure I've ever really seen the benefit of
>> > "Real Raid" except for
Cornell University
-Original Message-
From: owner-scientific-linux-us...@listserv.fnal.gov
[mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of Vladimir
Mosgalin
Sent: Monday, April 13, 2015 5:30 AM
To: scientific-linux-users@fnal.gov
Subject: Re: need SSD RAID contro
On Mon, Apr 13, 2015 at 08:25:51AM -0400, Nico Kadel-Garcia wrote:
> On Mon, Apr 13, 2015 at 8:10 AM, James M. Pulver wrote:
> > I would point out that I'm not sure I've ever really seen the benefit of
> > "Real Raid" except for the vendor making more money. The only place I've
> > used it is i
On Mon, Apr 13, 2015 at 12:10:22PM +, James M. Pulver wrote:
>
> I would point out that I'm not sure I've ever really seen the benefit of
> "Real Raid" except ...
>
Biggest benefit is you get to test your backup system when the hardware raid
card fails
and eats your data (or you have no rela
On Fri, Apr 10, 2015 at 05:21:07PM -0700, ToddAndMargo wrote:
>
> I have a customer interested in high end workstation. She wants RAID
> 1 to protect her drives. She is also interested in Solid State
> Drives.
> (And she knows the difference between RAID and Backup.)
>
> What host controller woul
On Mon, Apr 13, 2015 at 8:10 AM, James M. Pulver wrote:
> I would point out that I'm not sure I've ever really seen the benefit of
> "Real Raid" except for the vendor making more money. The only place I've
> used it is in iSCSI boxes that run everything in firmware.
The ability to properly RAI
Original Message-
From: owner-scientific-linux-us...@listserv.fnal.gov
[mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of Vladimir
Mosgalin
Sent: Monday, April 13, 2015 5:30 AM
To: scientific-linux-users@fnal.gov
Subject: Re: need SSD RAID controller advice
Hi ToddAndMarg
Hi ToddAndMargo!
On 2015.04.12 at 17:35:04 -0700, ToddAndMargo wrote next:
> On 04/12/2015 10:54 AM, Nico Kadel-Garcia wrote:
> >and I*loved* 3Ware
>
> Me too. LSI gobbled them up.
Well, consolidation is often a good thing.
You can still buy best performing 3Ware 9750 (2011 model!) from LSI
On 04/12/2015 10:54 AM, Nico Kadel-Garcia wrote:
and I*loved* 3Ware
Me too. LSI gobbled them up.
--
~~
Computers are like air conditioners.
They malfunction when you open windows
~~
On Sat, Apr 11, 2015 at 5:36 PM, ToddAndMargo wrote:
> On 04/11/2015 11:22 AM, Nico Kadel-Garcia wrote:
>>
>> RAID is not backup.
>
>
> Hi Nico,
>
> She is well aware.
>
> And you are correct about goofing a file being
> far more prevalent.
>
> Also, backup needs history, otherwise you can't resto
On 04/11/2015 03:13 PM, Kevin K wrote:
On Apr 11, 2015, at 4:39 PM, ToddAndMargo wrote:
On 04/11/2015 11:06 AM, Brandon Vincent wrote:
IR mode
What is IR mode?
That appears to be when the controller is running in RAID mode. Especially
with integrated controllers, there can be the option
> On Apr 11, 2015, at 4:39 PM, ToddAndMargo wrote:
>
> On 04/11/2015 11:06 AM, Brandon Vincent wrote:
>> IR mode
>
> What is IR mode?
That appears to be when the controller is running in RAID mode. Especially
with integrated controllers, there can be the option to run the drives in raid
mode
On 04/11/2015 11:06 AM, Brandon Vincent wrote:
IR mode
What is IR mode?
On 04/11/2015 11:22 AM, Nico Kadel-Garcia wrote:
RAID is not backup.
Hi Nico,
She is well aware.
And you are correct about goofing a file being
far more prevalent.
Also, backup needs history, otherwise you can't restore
after the goofed file gets backed up. (Often times,
the user doesn't kn
On Sat, Apr 11, 2015 at 2:03 PM, Brandon Vincent
wrote:
> On Sat, Apr 11, 2015 at 4:18 AM, Vladimir Mosgalin
> wrote:
>> Otherwise you're going to live with eventual performance degradation,
>> because hardware controllers (at least LSI and Adaptec) do not support
>> TRIM for drives in RAID.
>
>
On Sat, Apr 11, 2015 at 11:03 AM, Brandon Vincent
wrote:
> This is not correct. LSI SAS2008 I/O controllers do support TRIM with
> drives that support both deterministic trim (DRAT) and deterministic
> read zero after trim (DZAT).
My bad. I didn't see that this thread was about using the controll
On Sat, Apr 11, 2015 at 4:18 AM, Vladimir Mosgalin
wrote:
> Otherwise you're going to live with eventual performance degradation,
> because hardware controllers (at least LSI and Adaptec) do not support
> TRIM for drives in RAID.
This is not correct. LSI SAS2008 I/O controllers do support TRIM wi
Hi ToddAndMargo!
On 2015.04.10 at 17:21:07 -0700, ToddAndMargo wrote next:
> I have a customer interested in high end workstation. She wants RAID 1 to
> protect her drives. She is also interested in Solid State Drives.
> (And she knows the difference between RAID and Backup.)
>
> What host cont
On 04/10/2015 05:21 PM, ToddAndMargo wrote:
Hi All,
I have a customer interested in high end workstation. She wants RAID 1
to protect her drives. She is also interested in Solid State Drives.
(And she knows the difference between RAID and Backup.)
What host controller would you guys recommend f
Hi All,
I have a customer interested in high end workstation. She wants RAID 1
to protect her drives. She is also interested in Solid State Drives.
(And she knows the difference between RAID and Backup.)
What host controller would you guys recommend for a pair of Intel
SSDSC2BW480A401, 480 GB
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