I somewhat doubt it's a driver thing, since it happens only with WD drives, and it happens with both the mpt and mpt_sas drivers.
roy ----- Original Message ----- > Oh I see, I thought you were misusing the term sector and so I went > along > with your terminology. > > I realize this is a hardware/driver thing, but by increasing the > blocksize, > it may change the number of interrupts per operation (or otherwise > change > the temporal characteristics with which the driver interacts with the > hardware) and may help to mask a hardware defect. I thought that this > is > what you were suggesting. > > I don't have an investment in these drives, so I'll happily not use > them. > > On Mon, Aug 29, 2011 at 2:23 PM, Roy Sigurd Karlsbakk > <r...@karlsbakk.net>wrote: > > > file systems don't have sectors, they have blocks. and zfs normally > > uses > > 512b-128k blocks, which is fine. this issue won't be fixed by > > reducing the > > recordsize in zfs, it's a hardware/driver thing > > > > ----- Original Message ----- > > > I think Rich was suggesting using 4k sectors on the file system, > > > not > > > asking > > > what the drives sector size was. > > > > > > On Mon, Aug 29, 2011 at 2:15 PM, Roy Sigurd Karlsbakk > > > <r...@karlsbakk.net>wrote: > > > > > > > All drives have 512b sector sizes, WD FASS (blacks) and WD EADS > > > > (greens) > > > > both use plain old 512 sectors..... > > > > > > > > ----- Original Message ----- > > > > > The drives are attached to a backplane? > > > > > > > > > > Try using 4k sector sizes and see if that improves it - I've > > > > > seen > > > > > and > > > > > been part of a number of discussions which involved this - and > > > > > you, I > > > > > think, actually. > > > > > > > > > > - Rich > > > > > > > > > > On Mon, Aug 29, 2011 at 5:07 PM, Roy Sigurd Karlsbakk > > > > > <r...@karlsbakk.net> wrote: > > > > > > Hi all > > > > > > > > > > > > It seems recent WD drives that aren't "Raid edition" can > > > > > > cause > > > > > > rather a lot of problems on RAID systems. We have a few > > > > > > machines > > > > > > with LSI controllers (6801/6081/9201) and we're seeing > > > > > > massive > > > > > > errors occuring. The usual pattern is a drive failing or > > > > > > even a > > > > > > resilver/scrub starting and then, suddenly, most drives on > > > > > > the > > > > > > whole > > > > > > backplane report errors. These are usually No Device (as > > > > > > reported by > > > > > > iostat -En), but the result is that we may see data > > > > > > corruption > > > > > > at > > > > > > the end. We also have a system setup with Hitachi Deskstars, > > > > > > which > > > > > > has been running for almost a year without issues. One > > > > > > system > > > > > > with a > > > > > > mixture of WD Blacks and greens showed the same errors as > > > > > > described, > > > > > > but has been working well after the WD drives were replaced > > > > > > by > > > > > > deskstars. > > > > > > > > > > > > Now, it seems WD has changed their firmware to inhibit > > > > > > people > > > > > > from > > > > > > using them for other things than toys (read: PCs etc). Since > > > > > > we've > > > > > > seen this issue on different controllers and different > > > > > > drives, > > > > > > and > > > > > > can't reproduce it with Hitachi Deskstars, I would guess the > > > > > > firmware "upgrade" from WD is the issue. > > > > > > > > > > > > Would it be possible to fix this in ZFS somehow? The drives > > > > > > seem > > > > > > to > > > > > > work well except for those "No Device" errors.... > > > > > > > > > > > > Vennlige hilsener / Best regards > > > > > > > > > > > > roy > > > > > > -- > > > > > > Roy Sigurd Karlsbakk > > > > > > (+47) 97542685 > > > > > > r...@karlsbakk.net > > > > > > http://blogg.karlsbakk.net/ > > > > > > -- > > > > > > I all pedagogikk er det essensielt at pensum presenteres > > > > > > intelligibelt. Det er et elementært imperativ for alle > > > > > > pedagoger > > > > > > å > > > > > > unngå eksessiv anvendelse av idiomer med fremmed > > > > > > opprinnelse. I > > > > > > de > > > > > > fleste tilfeller eksisterer adekvate og relevante synonymer > > > > > > på > > > > > > norsk. > > > > > > > > > > > > _______________________________________________ > > > > > > OpenIndiana-discuss mailing list > > > > > > OpenIndiana-discuss@openindiana.org > > > > > > http://openindiana.org/mailman/listinfo/openindiana-discuss > > > > > > > > > > > > > > > > _______________________________________________ > > > > > OpenIndiana-discuss mailing list > > > > > OpenIndiana-discuss@openindiana.org > > > > > http://openindiana.org/mailman/listinfo/openindiana-discuss > > > > > > > > -- > > > > Vennlige hilsener / Best regards > > > > > > > > roy > > > > -- > > > > Roy Sigurd Karlsbakk > > > > (+47) 97542685 > > > > r...@karlsbakk.net > > > > http://blogg.karlsbakk.net/ > > > > -- > > > > I all pedagogikk er det essensielt at pensum presenteres > > > > intelligibelt. Det > > > > er et elementært imperativ for alle pedagoger å unngå eksessiv > > > > anvendelse av > > > > idiomer med fremmed opprinnelse. I de fleste tilfeller > > > > eksisterer > > > > adekvate > > > > og relevante synonymer på norsk. > > > > > > > > _______________________________________________ > > > > OpenIndiana-discuss mailing list > > > > OpenIndiana-discuss@openindiana.org > > > > http://openindiana.org/mailman/listinfo/openindiana-discuss > > > > > > > > > > > > > > > > -- > > > "I hope some animal never bores a hole in my head and lays its > > > eggs in > > > my > > > brain, because later you might think you're having a good idea but > > > it's just > > > eggs hatching" - Jack Handy > > > _______________________________________________ > > > OpenIndiana-discuss mailing list > > > OpenIndiana-discuss@openindiana.org > > > http://openindiana.org/mailman/listinfo/openindiana-discuss > > > > -- > > Vennlige hilsener / Best regards > > > > roy > > -- > > Roy Sigurd Karlsbakk > > (+47) 97542685 > > r...@karlsbakk.net > > http://blogg.karlsbakk.net/ > > -- > > I all pedagogikk er det essensielt at pensum presenteres > > intelligibelt. Det > > er et elementært imperativ for alle pedagoger å unngå eksessiv > > anvendelse av > > idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer > > adekvate > > og relevante synonymer på norsk. > > > > _______________________________________________ > > OpenIndiana-discuss mailing list > > OpenIndiana-discuss@openindiana.org > > http://openindiana.org/mailman/listinfo/openindiana-discuss > > > > > > -- > "I hope some animal never bores a hole in my head and lays its eggs in > my > brain, because later you might think you're having a good idea but > it's just > eggs hatching" - Jack Handy > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss -- Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
