Re: SATA performace

2006-01-03 Thread Andargor The Wise
--- Paul Aviles [EMAIL PROTECTED] wrote: Are SATA drives similar in performance than IDE drives? I have tested Barracudas 7200.0 (500Gb) and WD too on the same type of servers (more than 1 unit) and what I am getting is painfully slow in terms of read/writes. Anyone out there with

Re: disk light remains on

2006-01-03 Thread Ric Wheeler
[EMAIL PROTECTED] wrote: Thanks for the reply. On Mon, Jan 02, 2006 at 11:49:14PM -0500, Ross Vandegrift wrote: I just began using RAID-1 (in 2.6.12) on a pair of SATA drives, and now the hard disk drive light comes on during booting--about when the RAID system is loaded--and stays on.

raid5 read performance

2006-01-03 Thread Raz Ben-Jehuda(caro)
I am checking raid5 performance. I am using asynchronous ios with buffer size as the stripe size. In this case i am using a stripe size of 1M with 2+1 disks. Unlike raid0 , raid5 drops the performance by 50% . Why ? Is it because it does parity checkings ? thank you -- Raz - To unsubscribe from

Re: 2.6.15-mm3 sata_mv / raid 5 array start failure on boot

2006-01-03 Thread Matt Darcy
Matt Darcy wrote: Hello all, I am still persisting with my quest for a usable sata_mv driver. The 2.5.15-rc5-m3 kernel appear to have been good to me. Before I attempt moving to later releases of the 2.6.15 tree I thought I'd get feedback from the people in the know This is an intentional

mdadm-2.2 typo

2006-01-03 Thread Roger Willcocks
mdadm-2.2/super1.c line 384: if (strcmp(update, uuid) == 0) memcmp(sb-set_uuid, info-uuid, 16); should probably be memcpy -- Roger - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at

Re: SATA performace

2006-01-03 Thread Dan Stromberg
Supposedly current versions of EVMS and LVM sit overtop of the same device mapper kernel component... Given this, I have to wonder if the situation hasn't changed since last evaluated. On Tue, 2006-01-03 at 00:36 -0800, Andargor The Wise wrote: --- Paul Aviles [EMAIL PROTECTED] wrote: Are

RE: Adding Reed-Solomon Personality to MD, need help/advice

2006-01-03 Thread Bailey, Scott
Interestingly, I was just browsing this paper http://www.cs.utk.edu/%7Eplank/plank/papers/CS-05-569.html which appears to be quite on-topic for this discussion. I admit my eyes glaze over during intensive math discussions but it appears tuned RS might not be as horrible as you'd think since

Re: aacraid just sucks?

2006-01-03 Thread Lajber Zoltan
On Tue, 3 Jan 2006, Mark Hahn wrote: has anyone gotten good performance from aacraid? if you configure, say the 21610SA controller as JBOD and use normal Linux MD raid, can you mitigate the pain? I have an ibm xseries 206 with aacraid: :03:02.0 RAID bus controller: Adaptec AAC-RAID (rev

Re: corrupt raid 5

2006-01-03 Thread John Stoffel
Lorac First I can't start the array because it complains about a bad Lorac superblock. What's the exact error you get here? And the version of mdadm that you're using? What's the output of 'cat /proc/mdstat' and 'mdadm --detail /dev/md?' where ? is the number of your raid 5 array? Lorac

Re: corrupt raid 5

2006-01-03 Thread Lorac Thelmwood
Seatools is a DOS based tool. It doesn't matter what OS you have. It just examines the drives themselves, not the filesystem. It is used to check if your drives are bad. echo 20 /proc/sys/dev/raid/speed_limit_max echo 2 /proc/sys/dev/raid/speed_limit_min The max is

Re: big raid5 trouble

2006-01-03 Thread Mitchell Laks
On Monday 02 January 2006 09:46 am, Czigola Gabor wrote: Yes, but the spare disk is just logically spare, because it was in the array just before everything got wrong. I mean the data is untouched on it. If I force it (with editing the raw disk superblock) to get a normal active disk, should