How to accurately identify a hard disk in kickstart

[century6]

Every time I install the OS, I find that the hard disk name is always changing, and I can not accurately identify the hard disk through sda, sdb and sdc. This bothers me because I install linux through kickstart, but my server has multiple hard disks, and I just want to install the system on the same hard disk every time. I know that sdX is not a persistent name for Linux, but I still want to know if there is a way to solve my problem?

[poncovka]

Hi! There are several alternatives you can use. They are described in the kickstart documentation:
https://pykickstart.readthedocs.io/en/latest/kickstart-docs.html#special-notes-for-referring-to-disks

[jkonecny12]

Unfortunately, I can mark as an answer just one comment but both #4155 (comment) and #4155 (comment) are correct.
(duplicate comment to have bigger visibility.

[ozgyilmaz]

Hello,

You can use "lsblk" command in %pre section. So that you can decide which disk you'll use according to lsblk's output.

For example "lsblk -Sbdo SIZE,NAME,MODEL" command may give some unique values for you to choose.

In my environment i always make the installation on RAID disks, so i need to select the RAID disk, not other physical disks. I use below values to identify the suitable disk and it's size.

disk=`lsblk -Sbdo SIZE,NAME,MODEL | egrep -iv "DVD|sr0|VMware" | egrep "PERC|LOGICAL VOLUME|LSI|Virtual disk|QEMU" | sort -n -k1 | head -n 1| awk '{print $2}'`
    size=`lsblk -Sbdo SIZE,NAME,MODEL | egrep -iv "DVD|sr0|VMware" | egrep "PERC|LOGICAL VOLUME|LSI|Virtual disk|QEMU" | sort -n -k1 | head -n 1| awk '{print $1}'`

All runs in %pre section.

[jkonecny12]

Unfortunately, I can mark as an answer just one comment but both #4155 (comment) and #4155 (comment) are correct.