> - Will I be able to buy a replacement in 3-3 years that reports the disk in > such a way, that resilvering will work? According to the "Advanced Format" > threat this seems to be a problem. I was hopimg to get arond this with these > disks and have a more future proof solution
I think that if you are running an illumos kernel, you can use /kernel/drv/sd.conf and tell it that the physical sectors for a disk model are 4k, despite what the disk says (and whether they really are). So, if you want an ashift=12 pool on disks that report 512 sectors, you should be able to do it now without a patched version of zpool. > - Disk alignment: I am currently using whole disks AFAIK. But I do not > remember. Did I use slicing etc? Is my alignment correct (btw. How do > check?) So I thought: If I start over with a new pool O might get ot right > and this seemed easier with those disks... Whole disk method is generally recommended, and should align if it gets the sector size right, the only time I have manually sliced was to overprovision an SSD. I think prtvtoc is all you need to determine if it is aligned, if the bytes/sector value under Dimensions is the true (physical) sector size, it should be aligned (if it reports 512 when it has 4k sectors, then in theory if "First sector" is a multiple of 8, it is aligned, but it will probably issue writes of size 512 which will degrade performance anyway). Tim _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
