On Wed, 25 May 2005 danci@xxxxxxxxx wrote:
Hi,
I have 800+ machines all using Linux SW RAID-1. Recent kernels use modules for IDE (piix) and before those modules are loaded, I cannot turn on DMA. So I do this using hdparm from a rc.boot script.
The problem is that usually fails with 'hdX: lost interrupt' if the disks are busy due to RAID reconstruction - which happens a lot as some of the 800+ machines get rebooted for various reasons...
Of course I could be running without DMA (that's what I did on most critical machines), but that is painfully slow and it takes forever just to finish RAID reconstruction.
So I need to know if there is any way (kernel parameter would be ideal) to delay reconstruction for X seconds/minutes?
Any other suggestions to deal with the problem?
Thanks, Danilo
You can hot-remove the previous failed disk (anyway, it just started to resync). Then, activate DMA, then hot-add the disk to array.
Hope it helps.
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