Archives for: May 2010, 15

05/15/10

  04:20:00 pm, by The Dreamer   , 1373 words  
Categories: Software, Computer, Storage, Ubuntu

5-bay RAID and backuppc

Ever since I learned about 5-bay port multiplier SATA enclosures, I've been wanting to get one to play with. And, when I acquired 'orac'...I sought out a port multiplier eSATA adapter to include in the build of the system. And, then waited for support of the adapter in ubuntu. Stopped on 8.04LTS and waited for inclusion in a kernel.

I took a step closer when I finally got the 2-bay enclosure to mirror a pair of drives I had impulsively purchased. Since it worked, I then then bought a 5-bay enclosure (it came up as a NewEgg ShellShocker).

But, after some thought, I decided that what I wanted to do was build a 5 disk RAID5 using 1.5TB drives....so it would get me at least 5TB of real storage. And, set that I would wait until 1.5TB drives were under $100.

In the meantime, I collected a bunch of old SATA drives to see what I trouble I could get into....it didn't last long, as one was definitely dead and two quickly failed. Of course, two of the had been kicked out of RAID1 setups previously, and the other was a failing drive that I replaced/upgraded. So, it was back to waiting.

Eventually, I got 3 Samsung 1.5TB drives through NewEgg ShellShocker. And, I set up a 3 disk RAID5. Sadly, it didn't last very long....one of the drives failed while I was building the array. I exchanged it for a new drive with NewEgg, and waited for it before trying again. While I was waiting, I formatted it a bunch of times and learning about smartctl and various things of drive repair. One of the remaining two original drives, was showing signs of slow death and one unrecoverable sector. When, the new drive arrived...I did a long self test and a quick, but full, format....taking a couple days before I created the 3 disk RAID 5.

Once, that was done, I created a new big filesystem that is /var/lib/backuppc to have backuppc on 'orac'. Initially a 1TB filesystem.

Then one day, the bad happened. A drive on 'gumby' failed. It was time to stop putting off figuring out how to setup backuppc and start putting stuff into it. It turned out to be a lot easier than it thought to get started, though I did have to rebuild smbclient to have a longer timeout to get it successfully complete a full backup of a given partition. I then learned some other stuff and fine tuned the configs.... One big change was I broke out the windows hosts into individual partitions (ie, gumby_c, gumby_e, gumby_f), and came up with a 'semaphore' solution so that it wouldn't backup more than one partition at a time from a windows host. Eventually, I had all my systems in it (it fully backs up everything except itself, where it backs up only key parts....) I even got it backing up my work Mac Book Pro.

I later grew the filesystem out to 2TB.

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Now instead of subjecting some poor random forum to a long rambling thought, I will try to consolidate those things into this blog where they can be more easily ignored profess to be collected thoughts from my mind.

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