Messages in this thread |  | | Date | Thu, 04 Oct 2001 23:53:29 +0200 | From | Alessandro Suardi <> | Subject | Re: [POT] Which journalised filesystem ? |
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Alan Cox wrote: > > > > Alan mentioned this was something to do with the IBM hard disk > > > having strange write-cache properties that confuse ext3. > > > > Which IBM harddrive(s) does this? How can one check if it does? > > Its not specifically IBM, there are two sets of things to watch out for > > - Cache flush as a nop/unimplemented. This is legal in all but the > most recent ATA specification. The spec has been tightened so that > problem will go in time > > - Some IBM laptop drives appeared to fail to write back the cache on > machine shutdown/suspend etc. The exact rights/wrongs/details on > that one haven't been pinned down because the folks concerned > swapped a couple of drives for different ones, saw the problem > vanish and being a large organisation had the supplier replace the > other fifty odd.
[asuardi@dolphin asuardi]$ dmesg | grep hda ide0: BM-DMA at 0x0860-0x0867, BIOS settings: hda:DMA, hdb:pio hda: IBM-DJSA-220, ATA DISK drive hda: 39070080 sectors (20004 MB) w/1874KiB Cache, CHS=2432/255/63, UDMA(33) hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 hda8 >
This one has been used in the last 4 months without any issue doing lots of shutdowns, suspends, kernel rebuilds etc. ;)
--alessandro
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