> Date: Sat, 14 Nov 2009 20:29:59 -0600 > From: CyberLeo Kitsana <cyber...@cyberleo.net> > Subject: [FreeBSD Questions] Filesystem image as root > To: FreeBSD Questions <firstname.lastname@example.org> > Cc: CyberLeo <cyber...@cyberleo.net> > Message-ID: <4aff67a7.6040...@cyberleo.net> > Content-Type: text/plain; charset=ISO-8859-1 > > I have been thinking and experimenting for weeks, but I > cannot figure > this out. > > I have an Intel SS4200 NAS that I wish to use as a ZFS NAS > with FreeBSD 8.0. > > The device has 4 SATA bays, and I don't want to use one for > a UFS root disk. > > I don't want to use up hundreds of megabytes of RAM > preloading an > mfsroot that can never shrink. > > The single IDE connector is accessible via the legacy ISA > ports, and is > thus limited to PIO modes (about 1.6MB/sec max, even with > an actual hard > drive instead of a CF card).
You are off by an order of magnitude (base 2 or 10): Pio mode 0 is ~3.3 MB/s Pio mode 4 is ~16.7 MB/s http://www.pcguide.com/ref/hdd/if/ide/modesPIO-c.html You can probably set PIO mode 4 for with: # atacontrol mode ad0 PIO4 I am currently using ~ 159MB on my root partition, At 16.7MB/s that is a 10 second load time; and as you said, frequently used files will be cached. (I have a CF card that has 15MB/s symmetric read/write. Don't know how special it is.) With a CF card there should be no seek delay of ~ 10 ms (for reads anyway, deleting blocks probably takes 10ms). Regards, James Phillips <SNIPPED pivot_root attempt I can't help with.> My summary: maybe you are trying too hard :) __________________________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now http://ca.toolbar.yahoo.com. _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"