Date: Thu, 5 Jul 2001 17:00:51 -0700 (PDT) From: David Wolfskill <david@catwhisker.org> To: bgrubin@pobox.com, current@freebsd.org Subject: Re: softupdates on / Message-ID: <200107060000.f6600pR18131@bunrab.catwhisker.org> In-Reply-To: <00a001c105ac$c730ea30$020aa8c0@gozer>
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>From: "Benjamin P. Grubin" <bgrubin@pobox.com> >Date: Thu, 5 Jul 2001 19:46:54 -0400 >As of a month ago or so, there was some discussion that concluded it was >unsafe to enable softupdates on a root partition. Is it safe to go back in >the water there, now? Well, despite the warnings, I've been running with soft updates turned on for each UFS on my laptop; although there were some cases (around 5 or 6 weeks ago, if my time sense isn't totally screwed up) where -CURRENT wouldn't stay up, and fsck was doing some Very Unpleasant Things, I was able to cope OK. However, I've configured the laptop in what is arguably a rather peculiar way: I can boot from any of 3 slices, each of which has its own / and /usr. (/var is common to all, and /usr/local, as well as /home and /cvs are all symlinks in each to a common file system.) Regardless of which slice is booted, each slice's file systems are mounted and visible. There's more detail about that stuff at http://www.catwhisker.org/~david/FreeBSD/laptop.html. I've been running the box this way since early March, and have -STABLE (from different days, or with other differences, such as experimental code) on the 1st 2 slices, and -CURRENT on the 3rd. I've been tracking each of -STABLE and -CURRENT daily (modulo a few cases where I couldn't build -CURRENT a while back). Thus, I have some levels of fallback that a more conventional layout might not have. (I also have some additional exposure, since a suitably-corrupted "fsck" could trash everything.) But one of my purposes here is to try things out & try to help identify (& fix) any problems I see.... :-} Anyhow: m147[1] uname -a FreeBSD m147.whistle.com 5.0-CURRENT FreeBSD 5.0-CURRENT #60: Thu Jul 5 09:27:4 9 PDT 2001 root@m147.whistle.com:/common/C/obj/usr/src/sys/LAPTOP_30W i386 m147[2] df -k Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/ad0s3a 158783 79807 66274 55% / devfs 1 1 0 100% /dev /dev/ad0s1a 158783 41766 104315 29% /S1 /dev/ad0s1e 1870791 791927 929201 46% /S1/usr /dev/ad0s2a 158783 41839 104242 29% /S2 /dev/ad0s2e 1870791 813249 907879 47% /S2/usr /dev/ad0s3e 1870751 767973 953118 45% /usr /dev/ad0s3g 1016303 32365 902634 3% /var /dev/ad0s3h 10277074 5458487 3996422 58% /common procfs 4 4 0 100% /proc /dev/md10c 520140 444 478088 0% /tmp m147[3] swapinfo Device 1K-blocks Used Avail Capacity Type /dev/ad0s3b 1048448 4688 1043760 0% Interleaved m147[4] mount /dev/ad0s3a on / (ufs, local, soft-updates) devfs on /dev (devfs, local) /dev/ad0s1a on /S1 (ufs, local, soft-updates) /dev/ad0s1e on /S1/usr (ufs, NFS exported, local, soft-updates) /dev/ad0s2a on /S2 (ufs, local, soft-updates) /dev/ad0s2e on /S2/usr (ufs, NFS exported, local, soft-updates) /dev/ad0s3e on /usr (ufs, NFS exported, local, soft-updates) /dev/ad0s3g on /var (ufs, local, soft-updates) /dev/ad0s3h on /common (ufs, NFS exported, local, soft-updates) procfs on /proc (procfs, local) /dev/md10c on /tmp (ufs, local, soft-updates) m147[5] sudo boot0cfg -v ad0 # flag start chs type end chs offset size 1 0x00 73: 0: 1 0xa5 349:239:63 1103760 4188240 2 0x00 350: 0: 1 0xa5 626:239:63 5292000 4188240 3 0x80 627: 0: 1 0xa5 1023:239:63 9480240 29589840 4 0x00 0: 1: 1 0xa0 72:239:63 63 1103697 version=1.0 drive=0x80 mask=0x7 ticks=182 options=nopacket,update,nosetdrv default_selection=F3 (Slice 3) Cheers, david -- David H. Wolfskill david@catwhisker.org As a computing professional, I believe it would be unethical for me to advise, recommend, or support the use (save possibly for personal amusement) of any product that is or depends on any Microsoft product. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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