Ways of searching a disk/hdd in RHEL6
- There must be an entry in /sys/block/XXX
- # ls -lrt /sys/block/
- /proc/partitions ==> cat /proc/partitions
- major minor #blocks name
- 8 0 15728640 sda
- 8 1 512000 sda1
- 8 2 15215616 sda2
- 8 16 2097152 sdb
- 253 0 13148160 dm-0
- 253 1 2064384 dm-1
- To list all the disk in the machine ==> fdisk -l
- # fdisk -l /dev/?d?
- To avoid all the dm devices.
- # fdisk -l 2>/dev/null | grep "Disk \/"
- Disk /dev/sda: 16.1 GB, 16106127360 bytes
- Disk /dev/sdb: 2147 MB, 2147483648 bytes
- Disk /dev/mapper/VolGroup-lv_root: 13.5 GB, 13463715840 bytes
- Disk /dev/mapper/VolGroup-lv_swap: 2113 MB, 2113929216 bytes
- # lsblk
- NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
- sda 8:0 0 15G 0 disk
- ├─sda1 8:1 0 500M 0 part /boot
- └─sda2 8:2 0 14.5G 0 part
- ├─VolGroup-lv_root (dm-0) 253:0 0 12.6G 0 lvm /
- └─VolGroup-lv_swap (dm-1) 253:1 0 2G 0 lvm [SWAP]
- sdb 8:16 0 2G 0 disk
- sr0 11:0 1 1024M 0 rom
- # dmesg | grep disk
- sd 0:0:0:0: [sda] Attached SCSI disk
- sd 0:0:1:0: [sdb] Attached SCSI disk
- If you have the permission to install external utility try "lshw".
- # lshw -short | grep disk
- /0/100/7.1/0.0.0 /dev/cdrom disk SCSI CD-ROM
- /0/100/10/0.0.0 /dev/sda disk 16GB SCSI Disk
- /0/100/10/0.1.0 /dev/sdb disk 2147MB SCSI Disk
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