Date: Wed, 28 Jun 2006 11:51:35 -0400 From: "Tamouh H." <hakmi@rogers.com> To: <freebsd-questions@freebsd.org> Subject: busy disks - a lot of write activities on / part Message-ID: <20060628155129.2108C43D78@mx1.FreeBSD.org>
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I'm diagnosing a slow hard disk issues , trying to determine where the =
bottleneck in all of this. The system is FreeBSD 5.4 with SCSI U320 =
drives in RAID-5 on Adaptec 2130SLP Controller.
I'm noticing the / boot partition has the most activities for =
writes/Busy and was wondering if anyone can shed some lights on this and =
what can possibly be done to speed up the drives.
doing 'gstat' shows:
dT: 0.510 flag_I 500000us sizeof 240 i -1
L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name
0 0 0 0 0.0 0 0 0.0 0.0| acd0
1 141 6 259 6.6 135 1466 121.0 94.3| aacd0
0 0 0 0 0.0 0 0 0.0 0.0| aacd1
0 0 0 0 0.0 0 0 0.0 0.0| acd0t01
1 141 6 259 6.7 135 1466 121.0 94.5| aacd0s1
0 0 0 0 0.0 0 0 0.0 0.0| aacd1s1
1 61 0 0 0.0 61 549 16.6 101.2| aacd0s1a
0 0 0 0 0.0 0 0 0.0 0.0| aacd0s1b
0 0 0 0 0.0 0 0 0.0 0.0| aacd0s1c
0 73 0 0 0.0 73 906 205.1 48.6| aacd0s1d
0 4 2 4 7.9 2 12 242.6 49.1| aacd0s1e
0 4 4 255 6.1 0 0 0.0 2.4| aacd0s1f
0 0 0 0 0.0 0 0 0.0 0.0| aacd1s1c
0 0 0 0 0.0 0 0 0.0 0.0| aacd1s1d
0 0 0 0 0.0 0 0 0.0 0.0| aacd1s1e
This is df:
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/aacd0s1a 809998 59430 685770 8% /
devfs 1 1 0 100% /dev
/dev/aacd1s1e 1722888 14892 1570166 1% /tmp
/dev/aacd0s1f 209955742 62440662 130718622 32% /home
/dev/aacd0s1d 35921132 6151076 26896366 19% /usr
/dev/aacd0s1e 22270798 3480300 17008836 17% /var
devfs 1 1 0 100% /var/named/dev
procfs 4 4 0 100% /proc
/dev/aacd1s1d 137099908 70149522 55982394 56% /backup
Any info on matter of disks performance is much appreciated.
Thx,
Tamouh Hakmi
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