Date: Wed, 15 May 1996 18:06:32 -0400 (EDT) From: "Marc G. Fournier" <scrappy@ki.net> To: Brian Tao <taob@io.org> Cc: "Amancio Hasty Jr." <hasty@rah.star-gate.com>, Joe Greco <jgreco@brasil.moneng.mei.com>, FREEBSD-CHAT-L <freebsd-chat@freebsd.org> Subject: Re: 3 terabytes on one server? (was Re: more than 32 scsi disks on a single machine ?) Message-ID: <Pine.NEB.3.93.960515180413.3681D-100000@freebsd.ki.net> In-Reply-To: <Pine.NEB.3.92.960513172246.14554X-100000@zot.io.org>
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On Mon, 13 May 1996, Brian Tao wrote:
> Whether I use '2' or '1' for the non-root disks, it takes 5:50 to
> fsck the four drives. sd1 to sd3 are 4GB drives, so parallelizing an
> fsck should have a noticeable difference. I'm invoking it as "fsck -y"
> as well as "fsck -y -l 10". What am I missing?
>
You aren't running fsck in "preen mode" (fsck -p)...
>From the man page:
SYNOPSIS
fsck -p [-f] [-m mode]
fsck [-b block#] [-c level] [-l maxparallel] [-y] [-n] [-m mode]
[filesystem] ...
DESCRIPTION
The first form of fsck preens a standard set of filesystems or the speci-
fied filesystems. It is normally used in the script /etc/rc during auto-
matic reboot. Here fsck reads the table /etc/fstab to determine which
filesystems to check. Only partitions in fstab that are mounted ``rw,''
``rq'' or ``ro'' and that have non-zero pass number are checked.
Filesystems with pass number 1 (normally just the root filesystem) are
checked one at a time. When pass 1 completes, all remaining filesystems
are checked, running one process per disk drive. The disk drive contain-
Marc G. Fournier scrappy@ki.net
Systems Administrator @ ki.net scrappy@freebsd.org
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