[tech] Motsugo outage and disk replacement

[Andrew Adamson]

Hi All,

So, today I learned that mdraid doesn't like you adding a hot spare to an 
array while said array is rebuilding. It appears to make the server hang 
by blocking all disk reads/writes. Fun. Anyway that's why motsugo had to 
be rebooted without warning this evening.

Regarding the disks, I've purchased and installed WD 2TB Black spinning 
disk to replace sde which had 75,000 hours on it and a persistent pending 
sector. Once the array has fully rebuilt I'll add the old disk as a hot 
spare (sdh, bottom right bay), since it will do in a pinch.

Andrew Adamson
bob at ucc.asn.au

|"If you can't beat them, join them, and then beat them."                |
| ---Peter's Laws                                                        |