Partition UUID and Label
- Get UUID and Label
# blkid /dev/sda1: SEC_TYPE="msdos" UUID="62AC-64E2" TYPE="vfat" /dev/sda2: UUID="ebc16f0e-586d-466e-aba5-321016b401e9" TYPE="ext4" /dev/sda3: UUID="9bb04b5a-e6c8-48ae-b802-4084f3943945" TYPE="xfs" /dev/sda4: UUID="439969cb-2311-40e9-b1bc-6ede1bd185ef" TYPE="swap" /dev/sdc1: UUID="6450978C50976398" TYPE="ntfs" /dev/sdc2: UUID="fc5d0b9e-6092-410d-b000-c567be2eb940" TYPE="ext4" /dev/sdb1: UUID="665d6352-b050-4702-b4f0-c6242c785127" TYPE="xfs"
- More about UUID, WWID
# ll /dev/disk/by-id # ll /dev/disk/by-uuid # ll /dev/disk/by-path # WWID # scsi_id -g -u -s /block/sda #for udev-095(OL5) # scsi_id -g -u -d /dev/sda # for udev-147(OL6)
- Change Label
//ext2, ext3, ext4 # e2label <device> <label name> //ocfs2 # tunefs.ocfs2 -L <label name> <device>
I/O Performance Test
Throughput
# dd if=/dev/zero of=/dev/sda2 bs=1G count=1 oflag=direct