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On 09/11/18 01:16, Dale wrote: |
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> Howdy to all, |
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> |
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> I have a interesting problem coming up. Currently, I have two 3TB |
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> drives for my /home mount point. A lot of this is videos but some pdf |
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> files and other documents as well plus a photo collection of family |
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> stuff etc. |
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> |
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> Filesystem Size Used Avail Use% |
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> Mounted on |
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> /dev/mapper/Home2-Home2 5.4T 3.7T 1.8T 68% /home |
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> |
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> I've got a little over 25% or so of usable space left. At that point or |
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> shortly thereafter, it could start causing some issues according to what |
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> I've read anyway. Either way, shortly after that, being full will |
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> certainly be a issue. I'm full up on my motherboard SATA ports. Even |
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> if I buy a larger drive or drives, I'd have to unplug one to move things |
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> over and likely repeat that a few times. I could do that and likely |
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> will have to anyway but I'm trying to think a little farther ahead. |
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> Currently I have the more important stuff backed up to a external single |
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> 6TB USB drive, previous thread on that. I'm trying to come up with a |
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> plan that allows me to grow easier and without having to worry about |
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> running out of motherboard based ports. |
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> |
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Rich's ideas sound good. I'm in a similar situation to you - I'm about |
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to outgrow my existing 3TB setup, but I've got a new 4TB lined up |
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waiting to go (if I can get it to POST). |
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Small consumer grade SATA expansions are about £35, you should be able |
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to get a card that does port multiplier for that money, so that's 8 SATA |
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drives on that card. Watch out - while I would recommend them, some |
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cards are advertised as "2 SATA, 2 eSATA". That's only two ports, that |
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can be jumper-switched between SATA or eSATA. Great for backup or |
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disaster recovery as well as expansion. |
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Then think about how you're going to lay your filesystem out. My system |
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currently has three partitions (/, /var and /home). Mirrored (md raid 1) |
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onto a second 3TB drive, giving me 6TB total. Actually, not very |
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conducive to future expansion. |
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The new system is going to have the bare-metal drives set up as one huge |
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partition (actually not quite true - they'll be a 3TB and a 1TB for |
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practical reasons). The 3TB partitions will be raided into a raid 5 with |
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one of the old drives. The 1TB partitions will be raid 1 (system and |
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home, basically). |
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I'll then put lvm on the two raids before actually partitioning that to |
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give me /, /home, and anything else I want. |
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At this point, I can now replace any of the drives, grow my raid, my |
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lvm, or my partitions, at any time and underneath a running system |
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(okay, I don't have hotplug so I'd have to shut down the system to |
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physically swap a drive over, but ...). |
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And I'm thinking about btrfs, but the one thing you have to be really |
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careful with that is snapshots running out of space. |
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Cheers, |
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Wol |
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