====== Zeus RAID6 ======

btrfs RAID 6 w/8x3Tb WD Reds (as of 20231211)

===== BTRFS Scrub =====

btrfs scrubbing ensure rebuild doesn't result in data loss. Weekly might be too frequent?

<code>
sudo crontab -l 

0   0    3   *   *   btrfs scrub status /Volumes/Zeus >> /Volumes/Zeus/scrubstatus/status.txt
0   0    1   *   *   btrfs scrub start /Volumes/Zeus >> /Volumes/Zeus/scrubstatus/status.txt

# check the drive status at midnight. output anything that doesnt say online and spun up
0 0 * * * /usr/sbin/megacli -PDList -aALL |grep -i firmware\ state|grep -v ": Online, Spun Up$"

</code>
====== Status ======
<code>
megacli  -PDList -a0|grep status -i
</code>

====== Failures ======
Alarm will sound from rhea in the server room. Solid red light will be on hard drive enclosure that is failing.
Can hotswap: pull out bad bay and replace with new hard drive. 

| Date       | Bay | model       | sn | warranty? |
| 2017-07-21 | 5   | ??          | ?? |  ?? |
| 2023-12-09 | 5   | ''WD30EFRX''| ''WCC4N0AT1K2T''| no: ''[[https://support-en.wd.com/app/warrantystatusweb|28-Apr-2019]]''|

Rebuilt status ''/root/src/check_raid/watch_rebuild.pl'' or
<code>
megacli -PDRbld -ShowProg -PhysDrv[252:5] -a0
</code>