Any idea where to find a 4TB drive with 512 byte sectors? Hitachis drives are 512b on 3TB, but AFAICS they have jumped to 4k sectors since the 4TB drives came out
roy ----- Opprinnelig melding ----- > Umm, no, not all drives do this, it is relatively easy to get hold of > drives that aren't EARS ... you are just better off going for > non-consumer drives. > > Will post links if you need them. > > Jon > > On 15 February 2012 08:24, Roy Sigurd Karlsbakk <[email protected]> > wrote: > >> > Seems most drives are moving to 512-bytes-on-4k-sectors these > >> > days, > >> > as > >> > with the new 7K4000 drives from Hitachi. I saw a patch for zpool > >> > some time > >> > back, fixing ashift, but that's all. Is there an official fix > >> > somewhere? > >> > What do people with 4k drives do? > >> > > >> > >> If the drive reports its block size as 4K ZFS will do the right > >> thing > >> already. Only drives that lie about the actual block size and > >> report > >> 512 > >> bytes are problematic. > >> For such drives the technique I found useful is to create a pool on > >> some > >> other devices that are true 4K and then replace the devices one by > >> one > >> with > >> the problematic drives. > >> COMSTAR comes really handy for such a trick. Also Linux ZFS let you > >> specify > >> ashift manually during pool creation. > > > > Basically, *all* drives lie about this these days, so we'd better > > fix it in software instead of hoping drives and politicians stop > > lying. > > > > So I guess what must be done, then, is to port the fix from Linux > > ZFS to Illumos/OpenIndiana? Installing this system with linux zfs > > and then move to openindiana isn't very amusing... > > > > Any idea how much code this is? Or is it the old patch that was > > rejected a year ago or so? > > > > Vennlige hilsener / Best regards > > > > roy > > -- > > Roy Sigurd Karlsbakk > > (+47) 97542685 > > [email protected] > > 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 > > [email protected] > > http://openindiana.org/mailman/listinfo/openindiana-discuss > > _______________________________________________ > OpenIndiana-discuss mailing list > [email protected] > http://openindiana.org/mailman/listinfo/openindiana-discuss -- Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 [email protected] 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. ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
