Date: Tue, 15 Mar 2011 15:17:34 -0400 From: freebsd_user@guice.ath.cx To: freebsd-questions@freebsd.org Subject: Re: IDE -- mount partitions for better performance Message-ID: <5ab7e13805185464a4adf0c5d326671e.squirrel@wtp1.ath.cx> In-Reply-To: <201103151041.56373.erich@alogreentechnologies.com> References: <8a6023db5a3d4c8b34161f7ee0af29bb.squirrel@wtp1.ath.cx> <201103151041.56373.erich@alogreentechnologies.com>
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Annotated below ... > Hi, > > On Tuesday 15 March 2011 07:00:30 freebsd_user@guice.ath.cx wrote: >> freebsd-questions@freebsd.org >> >> Guidance with the following: >> >> We are limited to Support for ATA-100/66/33 IDE and ATAPI compliant >> devices. With that said, we have our atapi/33 optical on a add in >> controller (PCI) and are seeking to place four HDD’s on the main boards >> controllers. Our dilemma is where to place /, /tmp, /usr and /var from >> a >> performance standpoint. We understand that /var does quite a bit of >> writing and probably should go on the master hdd, but what about the >> /usr, >> /tmp and root? Hell, I’m not sure my thinking is sane as to where I >> ‘think’ /var should be placed/mounted. >> > did I get it right? You have four hard disks? Yes, four separate HDD's > > If so, place /, /var /tmp on indiidual drives. Make the fourth disk usr > and mount the remaining space of the other three disks inside /usr/home. Are you suggesting something similar to: /dev/ad4s1a for / /dev/ad4s2a for /tmp /dev/ad4s3a for /usr /dev/ad4s4a for /var If so, my initial can current concern is which device (hdd) from the above list/configuration, should be connected to which cable connector (master or slave)? --depending on how much writing to a particular device is taking place; for instance during a 'build world' or while building anything from src. there is quite a bit of writing going on. I would think that making the disk/slice that is being written to a slave would decrease performance when the master to that slave is also being written to simultaneously. In such a case the slave would need to wait until the master is done writing before the slave would be able to write; Is my thinking on this sane? Please enlighten me/us. Thank you. > > Locate then stuff on the other three disks which you expect to be used in > parallel with the /usr disk. I'm lost on the above suggestion; not understanding this. > > Of course, you can mount it anywhere else if you want. > > Erich > >
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