Date: Sun, 21 Jan 2007 13:53:20 -0800 From: Garrett Cooper <youshi10@u.washington.edu> To: freebsd-questions@freebsd.org Subject: Re: more than 7 partitions on a SCSI-drive Message-ID: <45B3E0D0.70005@u.washington.edu> In-Reply-To: <a969fbd10701211254ha01cb66q4ca4fe474c0dfdb@mail.gmail.com> References: <ep0jcf$1meb$10@nermal.rz1.convenimus.net> <a969fbd10701211254ha01cb66q4ca4fe474c0dfdb@mail.gmail.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jeff Mohler wrote: > Ive never understood why we still partition drives so much..its one > spindle..sure, a hige filesystem might cause an edge performance > issue..but..its one spindle. > > / works. > > ? > > If there is a fundamental reason why we still partition things like we > only have 10, 20, or 40Mb RLL. or slightly larger ESDI drives from > back in the day..im willing to learn. > > > > On 1/21/07, Christian Baer <christian.baer@uni-dortmund.de> wrote: >> Hi folkes! >> >> Is there any way to do this with FreeBSD? >> >> Background: >> >> 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. >> >> Regards >> Chris One good reason I can think of is to partition (not the tech definition but the traditional definition, "to divide") filesystems such that if one person fills up "/", it won't cause a program that needs to write to "/var" or "/tmp" problems, which in the case of "/var" can bring down entire systems and infrastructures (happened before where I was working as IT when a CUPS server ran out of space on /var). Other than that.. not really sure. Maybe some of the older guard on the list know why. - -Garrett -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.1 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFs+DQEnKyINQw/HARAs9WAJ4mCGtm9f5VvcMEG9GcavMaeTlyGgCfd8nI GpToHvhZ924oeMXhc70KlAc= =6Bv2 -----END PGP SIGNATURE-----
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