How do I find out the number of disks I have on my linux system?

petulia3478

There will be variations between various linux platforms with regard to looking for information.

fdisk is found on all the common linux systems, so the easiest way is:

# fdisk -l

Disk /dev/sda: 72.9 GB, 72999763968 bytes
255 heads, 63 sectors/track, 8875 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        1306    10490413+  83  Linux
/dev/sda2            1307        2612    10490445   83  Linux
/dev/sda3            2613        3918    10490445   83  Linux

Disk /dev/sdb: 72.9 GB, 72999763968 bytes
255 heads, 63 sectors/track, 8875 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1          13      104391   83  Linux
/dev/sdb2              14        2624    20972857+  82  Linux swap
/dev/sdb3            2625        8874    50203125   8e  Linux LVM

To find out the number of disks you have on the linux SuSE linux system you do the following:

Here you can see two disks /dev/sda & /dev/sda, and the their partition information.

On SuSE linux, you can also do the following:

# cd /var/log
# grep SCSI boot.msg
<5>SCSI subsystem initialized
<5> Type: Direct-Access ANSI SCSI revision: 02
<5>SCSI device sda: 142577664 512-byte hdwr sectors (73000 MB)
<5>SCSI device sda: drive cache: write through
<5> Type: Direct-Access ANSI SCSI revision: 02
<5>SCSI device sdb: 142577664 512-byte hdwr sectors (73000 MB)
<5>SCSI device sdb: drive cache: write through