Messages in this thread | | | From | "C.Y.M." <> | Subject | RE: Changes to ide-probe.c in 2.6.9-rc2 causing improper detection | Date | Tue, 14 Sep 2004 00:03:09 -0700 |
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> > On Mon, Sep 13 2004, C.Y.M. wrote: > > After installing 2.6.9-rc2 on my PC today (x86 VIA Chipset > motherboard and > > Athlon XP CPU), The IDE detection during boot in probing > for ide2-5 and > > displaying errors, and the hard drives that it does find > are telling me that > > "hda: cache flushes not supported" (when they are displayed > as supported > > when using 2.6.9-rc1. > > Your drive doesn't advertise FLUSH_CACHE support, the model > for when we > use these commands changed between -rc1 and -rc2. This > essentially means > that you have to turn off write back caching for safe operations on a > journalled drive. > > Alan, I bet there are a lot of these. Maybe we should consider letting > the user manually flag support for FLUSH_CACHE, at least it > is in their > hands then. > > -- > Jens Axboe >
Thanks for the explanation. I can understand that some of the older drives will not support FLUSH_CACHE which is acceptable. On another note, since most computers only have IDE0 and IDE1 slots, is there a way to prevent the probe from returning errors on boot when looking for IDE2 to IDE5? Perhaps a kernel configuration option asking how many IDE's are expected to probe (defaulting to two)?
Best Regards, C.Y.M.
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