On Wed, 7 Jun 2000, Bryan Batchelder wrote:
> I always thought it was the necessary writes to all disks for a
> single write to the array???
>
but that applies to all RAID levels. 'tis common, so the biggest
bottleneck in RAID5 is CPU.
--
Paul Jakma [EMAIL PROTECTED]
PGP5 key: http://www
On Thu, 8 Jun 2000, Edward Schernau wrote:
> Not if it sucked - the point is that it could be done fairly cheaply,
> with cheap components.
ehmm.. the point i was trying to make is that the hardware
requirements for RAID5 are so much higher than for a simple
controller that it would be madness t
Paul Jakma wrote:
[SNIP]
> if you think any company would build a card with a general purpose
> CPU, (at least $15, if not ~$150 for a StrongARM), FlashRAM, DRAM,
> disk controller (IDE or SCSI), I/O bus interface (eg PCI bridge) then
> deliberately cripple it so that it could only act as a dri
Title: RE: ATA66 Raid
Most
intelligent Raid 5 implementations perform writes one of two
ways:
If the
code recognizes a series of writes (such as would happen if sequential writing
was occurring), it will cache the writes until it has a full block set, then
calculate the parity block, and
Title: RE: ATA66 Raid
I always thought it was the necessary writes to all disks for a single write to the array???
I am (obvisouly) not a RAID expert but that is what I was told by a few people who deal with RAID on Sun boxes...maybe they are wrong...
--b
-Original Message-
From
On Wed, 7 Jun 2000, Edward Schernau wrote:
> But YES, it's not out of the realm of possibility that a 7 cent
> resistor could make the normal card into a real RAID card.
to counter your NT ws/sv registry example, in the case of RAID we are
talking about tangible hardware where one application re
On Tue, 6 Jun 2000, Bryan Batchelder wrote:
> Also, isn't RAID5 incredibly slow on anything but a well cached hardware
RAID5 is CPU bound, so the CPU on the RAID controller becomes the
limiting factor. That's why the more recent RAID cards have very
beefy CPU's (eg SA1100's at 200MHz up[1]), an
> Try the following
>
> http://www.3ware.com/products/linux3ware.shtml
>
I've got three of these sitting on a shelf here; I'm not willing to risk
using them in a production system yet. The raid1 (mirroring) configuration
I'd want to use seems to have a rather nasty bug:
The firmware currently in
"m. allan noah" wrote:
>
> i will point this out AGAIN. the promise fastTrak is NOT hardware raid. did
> you really think 30 seconds with a soldering iron and a 7 cent resistor could
> make a hardware raid device from a 20 dollar ide card?
Well, yes, if Promise intentionally broke the card. C
hi peter
where did you get the "hot swap trays" for IDE drive ??
how is the connectors done...or does the tray have its
IDE drive connectors... and the try has a special connector
to go to the "raid" backplane ??
have you tried to pull power to the ide-based raid drive
say the master drive and
Fax
-Original
Message-
From: Bryan Batchelder [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 06, 2000
12:04 PM
To: 'Peter Frischknecht'
Subject: RE: ATA66 Raid
Hi peter, thanks for the reply.
My questions:
1. Best place to buy the 3ware escalade hardware?
Preferably online.
stTrak again?
>
> Thanks,
> --b
>
> -Original Message-
> From: m. allan noah [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 06, 2000 4:37 PM
> To: Bryan Batchelder; [EMAIL PROTECTED]
> Subject: RE: ATA66 Raid
>
>
> i will point this out AGAIN. the promi
Title: RE: ATA66 Raid
I bought the promise card because it acts like an abstraction layer between OS and RAID Array. Windows sees it as a huge 60GB drive, while it is really 2 30GBs. DOS sees it as one big disk.
I would like to point out that the FastTrak outperforms software raid in
raig [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 06, 2000 10:11 AM
> To: 'Bryan Batchelder'; '[EMAIL PROTECTED]'
> Subject: RE: ATA66 Raid
>
>
> Try the following
>
> http://www.3ware.com/products/linux3ware.shtml
>
> I have a Promise Utlra6
Title: RE: ATA66 Raid
You
are very welcome for the reply.
Your
questions:
1. I
purchased mine from : http://www.thelinuxstore.com/perl-bin/index.pl?catid=66
2. The
specs you saw are outdated. In fact, the PDF document that describes the
card is outdated. If you go to their Web site
t: Tuesday, June 06, 2000 10:29 AM
> To: Cavanaugh, Craig
> Cc: 'Bryan Batchelder'; '[EMAIL PROTECTED]'
> Subject: Re: ATA66 Raid
>
> "Cavanaugh, Craig" wrote:
> >
> > Try the following
> >
> > http://www.3ware.co
"Cavanaugh, Craig" wrote:
>
> Try the following
>
> http://www.3ware.com/products/linux3ware.shtml
>
> I have a Promise Utlra66 Card that is working great with a couple of WD
> Ultra DMA 66 drives
>
> On top of that, it's inside a BP6 system in the slot that share an Irq with
> a HPT??? ide co
ECTED]]
Sent: Tuesday, June 06, 2000 10:37 AM
To: Bryan Batchelder
Cc: '[EMAIL PROTECTED]'
Subject: Re: ATA66 Raid
On Tue, 6 Jun 2000, Bryan Batchelder wrote:
> Hi guys--
>
> I am setting up a small server (its an old dual PentiumPro 180 rig),
> and its main job is
On Tue, Jun 06, 2000 at 09:48:03AM -0400, Bryan Batchelder wrote:
> Seagate Barracuda 7200RPM ATA66 drives. What is the best ATA66 card to buy?
> Promise? I have a friend who set up a promise card and he said it kept
> crashing on him (once a day)
My HPT366 crash the machine hard, relieably and
Title: RE: ATA66 Raid
Cool, thats what I run on my personal machine (I have a BP6 with dual 550s) and I got the Promise card and modded it to be a FastTrak66 :-)
I am waiting for the linux FastTrak66 drivers though.
--b
-Original Message-
From: Cavanaugh, Craig [mailto:[EMAIL
t any lockups. I am
not using the HPT contoller at this time.
I'm using Raid 0.9 with the IDE patches.
> -Original Message-
> From: Bryan Batchelder [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, June 06, 2000 8:48 AM
> To: '[EMAIL PROTECTED]'
> Su
On Tue, 6 Jun 2000, Bryan Batchelder wrote:
> Hi guys--
>
> I am setting up a small server (its an old dual PentiumPro 180 rig),
> and its main job is just serving files. I want to throw in 3 or 4 30GB
> Seagate Barracuda 7200RPM ATA66 drives. What is the best ATA66 card to buy?
>
Title: ATA66 Raid
Hi guys--
I am setting up a small server (its an old dual PentiumPro 180 rig), and its main job is just serving files. I want to throw in 3 or 4 30GB Seagate Barracuda 7200RPM ATA66 drives. What is the best ATA66 card to buy? Promise? I have a friend who
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