|To:||James Rich <james@xxxxxxxxxxxxx>|
|Subject:||Re: restoring after running xfs_repair|
|From:||Michael Sinz <msinz@xxxxxxxxx>|
|Date:||Fri, 27 Sep 2002 14:03:39 -0400|
|Cc:||Eric Sandeen <sandeen@xxxxxxx>, XFS mailing list <linux-xfs@xxxxxxxxxxx>|
|User-agent:||Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.1b) Gecko/20020813|
James Rich wrote:
On Thu, 26 Sep 2002, Michael Sinz wrote:This sounds like the IDE-write cache does not flush before power off problem. There is a "fix" to this in some systems that has the shutdown process, after syncing/unmounting stuff do a powerdown of the IDE drives to force them to write their caches before doing a shutdown of the ATX power supply via APM/APCI.Yes, this seems likely now. After disabling ACPI and APM I noticed a message indicating that the IDE drives are being flushed. I don't think this message was there before. Probably a problem with my dist. (I'm using Slackware - I'll report it there).
Note that a message that says they are being flush does not mean that they actually are - many (most) current IDE drives don't actually flush or sync when you tell them unless you tell them to spin down/power off. (At the drive level) This is why many distros are now not only doing the flush/sync command to the drives but then also doing a powerdown to the drives before hitting the ATX power (APM/ACPI). Many others has significant loss due to the power supply turning off faster than the drives had a chance to write their 1M/2M/8M buffers back to disk. -- Michael Sinz -- Director, Systems Engineering -- Worldgate Communications A master's secrets are only as good as the master's ability to explain them to others.
|<Prev in Thread]||Current Thread||[Next in Thread>|
|Previous by Date:||Re: block size in XFS = hard coded constant?, Stephen Lord|
|Next by Date:||Newer RH kernels?, Chris Weyl|
|Previous by Thread:||Re: restoring after running xfs_repair, James Rich|
|Next by Thread:||Re: restoring after running xfs_repair, James Rich|
|Indexes:||[Date] [Thread] [Top] [All Lists]|