Messages in this thread | | | Date | Tue, 03 Oct 2006 22:20:19 -0400 | From | Bill Davidsen <> | Subject | Re: dell poweredge 2400 harddisks going into offline mode when heavy I/O occurs |
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Matt Domsch wrote: > On Thu, Sep 28, 2006 at 04:19:23PM +0200, Folkert van Heusden wrote: >> Hi, >> >> I have a Dell Poweredge 2400 with 6 scsi harddisks in (hw-) raid 5. >> 512MB ram, 2x P3. >> When heavy disk i/o occurs, the system puts the harddisks into offline >> mode causing the filesystems to be put in readonly. The current kernel >> is 2.6.8, with 2.4.27 this did not occure. Googling did not help. The >> disks all have green lights (there's a special led for each to indicate >> errors - that one is off). > > [snip] >> Sep 28 16:05:12 kasparov kernel: aacraid: Host adapter reset request. SCSI hang ? >> Sep 28 16:06:12 kasparov kernel: aacraid: SCSI bus appears hung >> Sep 28 16:06:12 kasparov kernel: scsi: Device offlined - not ready after error recovery: host 1 channel 0 id 0 lun 0 > > Yes, this is familiar. See: > > http://lists.us.dell.com/pipermail/linux-poweredge/2004-May/014694.html > > In addition, please consider mounting your file systems with > 'noatime', as this reduces the number of small writes being sent to > the disks. > > 2.6.x kernels have the ability to swamp the RAID controller firmware > with requests where 2.4.x kernels couldn't so easily.
Can you configure the controller as JBOD and use software raid. Would the controller keep up with that? > > Thanks, > Matt >
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