zfs – a helper script for labelling all those drives

I now have a Dell R7425 with 12 x 12TB HDD in the basement. A raidz2 zpool would give me about 120TB – with a significant resilver time. I have also thought about a creating 6 x mirrors and striping across them. That would give me about 72TB – that’s still a lot. However I do it, I’m going to label the partitions with the drive slot and serial number. I’m going to write a little helper script. I’m guessing by the time I finish writing this blog post, I could have done the labelling manually. However, if I have to redo the labelling because I messed up, I think that’s where the script will pay off. Some background This is the zpool status from r730-03: [16:42 r730-03 dvl ~] % zpool status pool: data01 state: ONLINE scan: scrub repaired 0B in 1 days 04:29:00 with 0 errors on Fri May 29 08:31:09 2026 config: NAME STATE READ WRITE CKSUM data01 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 gpt/SEAG_ZJV4HFPE ONLINE 0 0 0 gpt/SEAG_ZHZ16KEX ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 gpt/SG_ZHZ03BAT ONLINE 0 0 0…