Upgrade plan for Hastur hardware.
See also: HasturRaidArray
3TB
Original configuration of 6 x 500GB disks in RAID5.
Usable capacity: 2.4TB = (6 * 0.5TB) * ((5-1)/5)
8TB
Hastur Raid Upgrade to 4x 2TB disks in RAID6.
Usable capacity: 4.0TB = (4 * 2TB) * ((4-2)/4)
Backup
2x 2TB disks added as backups (1 on-site, 1 off-site) in RAID1.
Added no extra capacity.
14TB
Added 2x 3TB disks. 1 as off-site backup.
Substitute Strategy
- Add one 3TB disk to array. Capacity += 2TB.
Backup Replacement Strategy
- Add previous 2TB backup disk to array. Capacity += 2TB.
- Use new 3TB disk as on-site backup.
Upgrade Paths
From 2222[4],2 (current) to
- -> 222226,3 (keep one 3TB as backup, give Cos the other)
- -> 222233[8],2 (
- -> 222223[8],3
- -> (22)(22)44[8] -> (22)4444[12]
18TB
- Add 2x 3TB disks, move remaining 2TB disk to backup duty
- -> 333333[12], 2
- Hopefully sufficient for the next 3 years.
Upgrade Paths
Replace 2x 3TB with 2x 6TB
- -> (33)(33)66[12],33
- -> raid10?: (3|3)(3|3)(3|3)(3|3)[12]
36TB
CyclopsRaidUpgrade1
- Add 4x 6TB disks
- -> 666666[24]