On Tue, Jul 12, 2011 at 1:35 PM, Brandon High <bh...@freaks.com> wrote: > Most "enterprise" SSDs use something like 30% for spare area. So a > drive with 128MiB (base 2) of flash will have 100MB (base 10) of > available storage. A consumer level drive will have ~ 6% spare, or > 128MiB of flash and 128MB of available storage. Some drives have 120MB > available, but still have 128 MiB of flash and therefore slightly more > spare area. Controllers like the Sandforce that do some dedup can give > you even more effective spare area, depending on the type of data.
I see, thanks for that explanation. So finding drives that keep more space in reserve is key to getting consistent performance under ZFS. Eric _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
