Re: RAID Hard disk performance

2001-11-07 Thread Russell Coker
On Tue, 6 Nov 2001 20:46, Jesse Molina wrote: That is kind of funny, in my experience I have found that SCSI drives have a much higher death rate than IDE drives, by far. I had a similar experience years ago. I was working for a company where the owner was greatly impressed by SCSI. I had to

Re: RAID Hard disk performance

2001-11-07 Thread Roger Abrahamsson
Well, my experience instead is that scsi is rock solid compared to ide as long as you choose drives with same rotational speed etc. If you get those high rpm drives you have to be very careful with cooling. I try always to get 7200rpm drives and also stay away from certain brands, and then I

Re: RAID Hard disk performance

2001-11-07 Thread Jason Lim
. As for cooling... those 1rpm drives sure do run hot, so cooling is of utmost importance. - Original Message - From: Roger Abrahamsson [EMAIL PROTECTED] To: debian-isp@lists.debian.org Cc: debian-isp@lists.debian.org Sent: Wednesday, November 07, 2001 7:59 PM Subject: Re: RAID Hard disk

Re: RAID Hard disk performance

2001-11-06 Thread Dave Watkins
Not to start a holy war, but there are real reasons to use SCSI. The big ones are Much larger MTBF, faster access times due to higher spindle speeds, better bus management (eg 2 drives can perform tasks at once unlike IDE), Hot Swapable (This is HUGE) and more cache on the drive. I'll stop now

Re: RAID Hard disk performance

2001-11-06 Thread Russell Coker
On Tue, 6 Nov 2001 07:26, Dave Watkins wrote: Not to start a holy war, but there are real reasons to use SCSI. The big ones are Much larger MTBF, Mean Time Between Failures is not such a big deal when you run RAID. As long as you don't have two drives fail at the same time. Cheaper IDE

RE: RAID Hard disk performance

2001-11-06 Thread Jesse Molina
lanner, Snow # Network Engineer Maximum Charisma Studios Inc. # [EMAIL PROTECTED] 1.303.432.0286 # end of sig -Original Message- From: Dave Watkins [mailto:[EMAIL PROTECTED] Sent: Monday, November 05, 2001 11:27 PM To: debian-isp@lists.debian.org Subject: Re: RAID Hard

RE: RAID Hard disk performance

2001-11-06 Thread Dave Watkins
Message- From: Dave Watkins [mailto:[EMAIL PROTECTED] Sent: Monday, November 05, 2001 11:27 PM To: debian-isp@lists.debian.org Subject: Re: RAID Hard disk performance Not to start a holy war, but there are real reasons to use SCSI. The big ones are Much larger MTBF, faster access times

Re: RAID Hard disk performance

2001-11-06 Thread Dave Watkins
God.. this is turning into a war... I think this will be my last post on the subject When running RAID MTBF is not such a big deal... Unless you have a several racks of servers in 2U cases... 40-50 servers.. Would you rather drop 1 drive every month or 1 drive every year?? In a single machine

RAID Hard disk performance

2001-11-03 Thread Jeff Waugh
quote who=Russell Coker RAID-5 is another issue though. But then you have to consider that Linux software RAID kills the performance of most hardware RAID controllers. Run an Athlon 800 with two IDE drives in RAID-1 and expect 2-4 times the performance for bulk IO that an entry level

Re: RAID Hard disk performance

2001-11-03 Thread Russell Coker
On Sat, 3 Nov 2001 14:33, Jeff Waugh wrote: quote who=Russell Coker RAID-5 is another issue though. But then you have to consider that Linux software RAID kills the performance of most hardware RAID controllers. Run an Athlon 800 with two IDE drives in RAID-1 and expect 2-4 times the

Re: RAID Hard disk performance

2001-11-03 Thread Jeff Waugh
quote who=Russell Coker There's a number of guides that tell you about hdparm and what DMA is, but if you already know that stuff then there's little good documentation. Oh bum. :) Then on the rare occasions that I do meet people who know this stuff reasonably well they seem to spend all

RAID Hard disk performance

2001-11-03 Thread Jeff Waugh
quote who=Russell Coker RAID-5 is another issue though. But then you have to consider that Linux software RAID kills the performance of most hardware RAID controllers. Run an Athlon 800 with two IDE drives in RAID-1 and expect 2-4 times the performance for bulk IO that an entry level

Re: RAID Hard disk performance

2001-11-03 Thread Russell Coker
On Sat, 3 Nov 2001 14:33, Jeff Waugh wrote: quote who=Russell Coker RAID-5 is another issue though. But then you have to consider that Linux software RAID kills the performance of most hardware RAID controllers. Run an Athlon 800 with two IDE drives in RAID-1 and expect 2-4 times the

Re: RAID Hard disk performance

2001-11-03 Thread Jeff Waugh
quote who=Russell Coker There's a number of guides that tell you about hdparm and what DMA is, but if you already know that stuff then there's little good documentation. Oh bum. :) Then on the rare occasions that I do meet people who know this stuff reasonably well they seem to spend all