Disk very slow in FreeBSD
depocatcher at gmail.com
Sat Jul 10 02:57:39 UTC 2010
I've tried everything here:
and here: http://forums.freebsd.org/showthread.php?t=15722
Also followed this:
I have a 2TB WD drives that I would like to use as one big data partition.
I'm using UFS2. No raid, nothing fancy. I'm on FreeBSD 6.4 Release.
Under windows I can easily read/write about at ~75MB/s without doing
nothing but formatting it.
My friend has the same drives in Linux, he says he can get ~50MB/s on
his very low end system (crap cpu and only 256mb of ram).
Under FreeBSD, my write is at best ~6MB/s and read is about ~9MB/s. The
CPU, amount of ram, etc are all better than both the above boxes so
don't think it's bound by anything externally like that. From what I
read, the partitions aren't aligned correctly?
What's going on here? For start to finish, how should I partition and
format these so they don't suck?
[root at fire2 ~/drive]# diskinfo -v /dev/da3
512 # sectorsize
2000396746752 # mediasize in bytes (1.8T)
3907024896 # mediasize in sectors
243201 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
# size offset fstype [fsize bsize bps/cpg]
a: 3906961408 1 4.2BSD 4096 32768
bsdlabel -R /dev/da3 datadrive.cfg
newfs -S 4096 -b 32768 -f 4096 -O 2 -U -m 8 -o space -L u2 /dev/da3
/dev/da3 /u3 ufs rw 2 2
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