Folks. My env is Solaris 10 update 8 amd64. Does LUN alignment matter when I'm creating zpool's on disks (lun's) with EFI labels and providing zpool the entire disk?
I recently read some sun/oracle docs and blog posts about adjusting the starting sector for partition 0 (in format -e) to address lun alignment problems. However they never mention wether this matters for ZFS or not. In this scenario I have a lun provisioned from an STK 2540 and I put an EFI label on the disk. Then I modified partition 0 to start at sector 64 (tried 256 as well) and saved those changes. Once I do a zpool create the first sector get's set to "34". Here is the format output with the adjusted sector partition> pr Current partition table (original): Total disk sectors available: 31440861 + 16384 (reserved sectors) Part Tag Flag First Sector Size Last Sector 0 usr wm 256 14.99GB 31440860 1 unassigned wm 0 0 0 2 unassigned wm 0 0 0 3 unassigned wm 0 0 0 4 unassigned wm 0 0 0 5 unassigned wm 0 0 0 6 unassigned wm 0 0 0 7 unassigned wm 0 0 0 8 reserved wu 31440861 8.00MB 31457244 now create the zpool zpool create testsector c5t6006016070B01E0052374B8B4CAFDE11d0 partition table after zpool create partition> pr Current partition table (original): Total disk sectors available: 31440861 + 16384 (reserved sectors) Part Tag Flag First Sector Size Last Sector 0 usr wm 34 14.99GB 31440861 I know i'm missing something here and any tips would be appreciated. TIA. Deet. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
