s/w raid5

s/w raid5

[Ian Pratt]

Folks,

Has anyone got experience using s/w raid 5 and Xen?
I've had a report of crash in xenblkd under high disk load, and would
like to know whether this is a generic s/w raid5 thing, or something
specific to the SATA controllers in this particular setup.

Any relevant success or failure reports 

Thanks,
Ian

Re: s/w raid5

[Tupshin Harper]

Ian Pratt wrote:

>Folks,
>
>Has anyone got experience using s/w raid 5 and Xen?
>I've had a report of crash in xenblkd under high disk load, and would
>like to know whether this is a generic s/w raid5 thing, or something
>specific to the SATA controllers in this particular setup.
>
>Any relevant success or failure reports 
>
>Thanks,
>Ian
>
>  
>
/dev/md2:
        Version : 00.90.01
  Creation Time : Thu Aug  5 12:27:46 2004
     Raid Level : raid5

/dev/md3:
        Version : 00.90.01
  Creation Time : Mon Jan  3 03:26:37 2005
     Raid Level : raid5

/dev/md4:
        Version : 00.90.01
  Creation Time : Fri Sep 10 17:01:56 2004
     Raid Level : raid5

/dev/md6:
        Version : 00.90.01
  Creation Time : Fri Feb 11 08:21:00 2005
     Raid Level : raid5

 uname -a
Linux 2.6.11ac1-xen0 #2 Sun Mar 20 01:46:59 PST 2005 i686 GNU/Linux

 uptime
 23:48:18 up 20 days

No problems here...let me know if any other info would be useful.

-Tupshin

Re: s/w raid5

[Matt Ayres]

Has anyone got experience using s/w raid 5 and Xen?
I've had a report of crash in xenblkd under high disk load, and would
like to know whether this is a generic s/w raid5 thing, or something
specific to the SATA controllers in this particular setup.

> Any relevant success or failure reports

I have been running software RAID-5 on one of my servers for about 3 months 
now in production and it's been perfectly fine. 

Re: s/w raid5

[Chris Wedgwood]

On Tue, Apr 26, 2005 at 07:03:36AM +0100, Ian Pratt wrote:

> I've had a report of crash in xenblkd under high disk load, and
> would like to know whether this is a generic s/w raid5 thing, or
> something specific to the SATA controllers in this particular setup.

is the stack being overflowed?

Re: s/w raid5

[Pasi Kärkkäinen]

On Tue, Apr 26, 2005 at 07:03:36AM +0100, Ian Pratt wrote:
> 
> Folks,
> 
> Has anyone got experience using s/w raid 5 and Xen?
> I've had a report of crash in xenblkd under high disk load, and would
> like to know whether this is a generic s/w raid5 thing, or something
> specific to the SATA controllers in this particular setup.
> 
> Any relevant success or failure reports 
> 

md4 : active raid5 hdg6[2] hde6[1] hda6[0]
      212296704 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]

md5 : active raid5 sdd1[3] sdc1[2] sdb1[1] sda1[0]
      879100416 blocks level 5, 128k chunk, algorithm 2 [4/4] [UUUU]

Has been running fine since xen itself started to work without crashing :)

(I was running some bad testing version of xen which crashed once every 
three days or so)

-- Pasi Kärkkäinen
       
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