Jens Axboe schrieb am 2005-07-01: > On Fri, Jul 01 2005, Matthias Andree wrote: > > Jens Axboe <axboe@xxxxxxx> writes: > > > > > On Thu, Jun 30 2005, Edwards, Scott (GE Healthcare) wrote: > > >> Hello, > > >> > > >> Can anyone tell me if the write cache on SATA drives are handled such > > >> that journaling file systems work correctly? Back in the 2.6.5 - > > >> 2.6.7 time frame I had to disable the write cache to get ext3 to not > > >> trash things when the power was lost. With kernel 2.6.10 would I > > >> still need to disable the write cache? > > > > > > With 2.6.12.x it should work, if you use ext3 or reiser and the > > > appropriate mount options (-o barrier=1 for ext3, barrier=flush for > > > reiserfs). 2.6.11 and earlier does not work on SATA. > > > > I presume this means "libata" exclusively, no? > > It means "SCSI without queueing" which I'm assuming is basically only > libata at this moment, at least if you count setups that have a non-zero > userbase :) > > > Which is the oldest version where this works > > > > 1. for SCSI (perhaps by adaptor)? > > 2.6.12, with the above restriction. I hope to lift that for .13/14, with > Tejuns barrier updates. The "SCSI without queueing" isn't clear to me. What system exactly is meant "without queueing"? Does this mean SCSI with TCQ is safe? Does this means SCSI is safe only when TCQ isn't used? Does this apply to internals of the SCSI host adaptor driver? I'm not acquainted with kernel/block I/O queueing internals. > > 2. for traditional IDE (such as VIA 82*, PIIX_*)? > > In SUSE kernels, for many years. Since 2.6.7/8'ish in Linus' kernels. I don't care for vendor kernels. Is listing 2.6.8 safe? > > <http://home.pages.de/~mandree/linux/kernel/safe-write-caches.html> > > One important update, the 'oe' in my name is not an ascii safe variant > of the real name, it really is spelled that way :) Fixed. Thanks for your help. -- Matthias Andree - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
