Messages in this thread | | | Date | Thu, 20 Apr 2006 10:23:58 +0200 | From | Jens Axboe <> | Subject | Re: new Areca driver in 2.6.16-rc6-mm2 appears to be broken |
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(don't top post!)
On Thu, Apr 20 2006, erich wrote: > Dear Dear Jens Axboe, > > Thanks for your notification and advice. > Areca's firmware has max sg entries of 38 limit. > In my debug driver I had add this condition check. > But no one request more than 38 sg. > Both transfer length all have a lot of requests equal with 38 sg. > But why it ocur only at 4096 sectors? > If the /sys/block/sda/queue/max_sectors_kb equal 256 all operation running > well. > But if I modify it more than 256, the bug appeared. > I will do more research about why there were a lot of requests equal with > 38 sg in all file system.
It was just a suggestion, the bug might very well be just the size of the transfer itself and nothing SG related. All I can say for sure is that I'd be very surprised if this fs corruption isn't due to the hardware mangling the data for large transfers.
> And only it ocur at the volume that format with mkfs.ext2.
Most likely a coincidence, try running eg dbench or other stress tests on the fs with larger xfer size and I'm sure it'll corrupt eventually as well.
-- Jens Axboe
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