[RndTbl] Getting disk sizes of mountpoints
Vijay Sankar
vsankar at foretell.ca
Wed Feb 21 16:43:56 CST 2024
Doesn’t df -h give that info? Sorry if I misunderstood your question.
Sent from my iPhone
> On Feb 21, 2024, at 16:36, Kevin McGregor <kevin.a.mcgregor at gmail.com> wrote:
>
>
> With 'lsblk' I can get something like this:
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> sda 8:0 0 20G 0 disk
> └─sda1 8:1 0 20G 0 part
> ├─vg0-root 253:0 0 15G 0 lvm /
> └─vg0-var 253:1 0 5G 0 lvm /var
> sdb 8:16 0 100G 0 disk
> └─sdb1 8:17 0 100G 0 part
> └─vg1-data 253:2 0 100G 0 lvm /mnt/data
> sr0 11:0 1 1024M 0 rom
>
> What I'm looking for is output like:
> / 15G
> /var 5G
> /mnt/data 100G
>
> So I just want the size of the block devices which are actually mounted. I'm wondering what is the most reliable way to produce the second output. I can just grep for 'lvm', but I can't guarantee the mounts are all LVM type. I can grep for ' 253:', but is the 253 going to be reliable? What does 253 even mean?
>
> From https://www.kernel.org/doc/html/latest/admin-guide/devices.html :
> 240-254 block LOCAL/EXPERIMENTAL USE
> Allocated for local/experimental use. For devices not
> assigned official numbers, these ranges should be
> used in order to avoid conflicting with future assignments.
> ... which isn't encouraging. Is that list outdated? grep for '/'s?
>
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