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| A/UX -- how to fsck a large disk? |
Posted by: tattar8 on 2020-06-07 04:58:18
I have A/UX installed on a 4GB disk, which I recently found out is not a good idea since the Startup fsck can't fsck it. But I really don't want to start over with a fresh A/UX installation. At the moment the disk was unmounted dirty, but now it won't boot because the disk needs to be fscked by the booter. Is there any way I can convince A/UX to mount and boot from the disk even if it's marked dirty?
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Posted by: beachycove on 2020-06-07 23:44:38
From the A/UX FAQ: "Take care that you don't use too large a disk, however. The fsck in A/UX Startup that checks the root filesystem cannot scan a partition larger than 2GB. A/UX's own fsck can check larger partitions just fine."
If it were me, I'd bite the bullet, try with an installation on a smaller drive, boot into it, and then see if repairs on the larger drive are possible. A simple, cut-down A/UX installation wouldn't take long. If all went well, I'd then be back where I wanted to be.
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Posted by: tattar8 on 2020-06-09 02:32:18
Turns out it wasn't stuck, it was just slow, and gives no indication it's making any progress (very little HD activity). I left it for a couple of hours and came back to find it sitting at a repair confirmation prompt. The A/UX installer had actually partitioned the drive to a 2GB volume without me telling it to, so the volume wasn't actually 4GB after all.
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Posted by: uyjulian on 2020-06-09 15:32:03
Partitioning management will be slow, especially if you are on a slower machine managing large disks.
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Posted by: rplacd on 2020-06-09 16:29:15
In general, fscking large disks in older Unices with non-journaled filesystems is a PITA – every time you don't do a clean shutdown, lots of inodes get screwed up. I've ruined so many installations of OPENSTEP as well like that.
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Posted by: cheesestraws on 2020-06-09 18:12:45
2G is really plenty for individual A/UX partitions anyway, at least in a “play” context. Certainly enough for /. I think I have mine set up with 2G /, 2G /usr, 2G /home and I think I put /opt on its own partition too. This is overdone, but I didn’t know what I was doing 🙂
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