more than 7 partitions on a SCSI-drive
youshi10 at u.washington.edu
Sun Jan 21 21:58:08 UTC 2007
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Christian Baer wrote:
> Hi folkes!
> Is there any way to do this with FreeBSD?
> I have to admit, that I have never actually done or even tried this with
> any OS whatsoever. I am running a two drive system with two mirrors on
> it. Because I wanted a lot of room for /usr while /usr/home ist mounted
> on a different partition, the second drive is filled with the two
> mirror partitions, /usr and a swap partition. Everything else is mounted
> on the first drive. That being: /, /temp, /var, /usr/obj and the second
> swap partition. Together with the two mirrors this means seven (in
> words: 7) partitions. The table looks like this:
> Filesystem Size Used Avail Capacity Mounted on
> /dev/da0a 501M 72M 389M 16% /
> devfs 1.0K 1.0K 0B 100% /dev
> /dev/da0d 1.9G 102K 1.8G 0% /tmp
> /dev/da1f 21G 2.9G 17G 15% /usr
> /dev/da0h 6.8G 742M 5.5G 12% /usr/obj
> /dev/da0e 4.8G 71M 4.4G 2% /var
> /dev/mirror/sec1.eli 9.8G 7.5M 9.0G 0% /usr/home
> /dev/mirror/sec0.eli 34G 21M 32G 0% /usr/home/christian
> What really sounds (and probably is) pathetic is that I have nearly 6
> gigs of 'leftover' space on da0. Increasing the size of the mounted
> partitions isn't really useful anymore (apart from reducing the free
> space) as I for example probably won't be needing 2GB for /temp or more
> than 5GB for /var - those are the sizes I have allocated now. Making /
> any bigger than the current 512MB wouldn't bring any advances either.
> Increasing the size of the mirrors isn't an option because that would be
> schrinking /usr. Finding a new mount point wouldn't be a problem. I was
> thinking something along the lines of /usr/ports. /usr/src was an idea
> at first but since I want to keep that on a different physical drive
> than /usr/obj, the idea doesn't seem that bright anymore.
> But the
> problem is that I can't allocate another partition, not that I ran out
> of ideas for mount points. :-) On other machines with IDE-drives I had
> one slice with partitions inside and never ran into this limitation
> before. Is there any way to do something like that on SCSI-drives? We
> are talking about SPARC64 here.
Why create so many partitions? You can use slices to your benefit and
you wouldn't use up your allocatable partitions on the disk's MBR.
[gcooper at sprsd ~]$ df -h | grep ad0
/dev/ad0s1a 739M 40M 639M 6% /
/dev/ad0s2d 62G 56G 1.1G 98% /store/ad0
/dev/ad0s1d 1.9G 1.1M 1.8G 0% /tmp
/dev/ad0s1e 3.9G 3.2G 377M 90% /usr
/dev/ad0s1f 1.9G 143M 1.6G 8% /var
Note that all that I used was 1 partition and to supplement that I used
The only thing given my example that I suggest is that you make /usr
large than what I made it; the size I made it's really too small for the
/usr slice.. Arg.
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