On 7 December 2010 13:55, Tim Cook <t...@cook.ms> wrote: > It's based on a jumper on most new drives. > Can you back that up with anything? I've never seen anything but requests for a jumper that forces the firmware to export 4KiB sectors.
WD EARS at launch provided the ability to force the requested LBA to be written to disk as LBA + 1 (a workaround to get Windows XP to make aligned partitions), as per http://www.anandtech.com/show/2888/2 On 7 December 2010 13:57, Brandon High <bh...@freaks.com> wrote: > It depends on the drive. According to Anandtech, the WD drives use 4k > internally but report 512b sectors. And hence, will incorrectly create an ashift=9 vdev. They also report that the Seagate > GoFlex uses 512b sectors internally but reports 4k sectors through > it's desktop dock. > Sorry, you're right. If they're using 512B internally, this is a non-event here. I think that most folks talking about 3TB drives in this list are looking for internal drives. That the desktop dock (USB, I presume) coalesces blocks doesn't really make any difference. Waiting for a 3TB drive that properly reports it capabilities to become > available is probably the best course of action. Buying 4KiB physical sector drives which export 512B sectors is fine, as long as you use a modified binary which has a hardcoded ashift=12 value. Otherwise, you're asking for trouble (and terrible performance). Cheers,
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