Subject: Re: iostat "md#" disks
To: Erik E. Fair <fair@clock.org>
From: Jason Thorpe <thorpej@nas.nasa.gov>
List: port-sun3
Date: 10/29/1997 19:37:31
On Wed, 29 Oct 1997 14:54:56 -0800
"Erik E. Fair" (Time Keeper) <fair@clock.org> wrote:
> tty sd0 md0 md1 cpu
> tin tout KB/t t/s MB/s KB/t t/s MB/s KB/t t/s MB/s us ni sy in id
> 1 213 7.14 3 0.02 0.00 0 0.00 0.00 0 0.00 7 9 14 0 69
>
> Filesystem 1K-blocks Used Avail Capacity Mounted on
> /dev/sd0a 22303 11605 9582 55% /
> mfs:20 7911 4 7511 0% /tmp
> procfs 8 8 0 100% /proc
> kernfs 1 1 0 100% /kern
> /dev/sd0d 178543 4162 165453 2% /var
> /dev/sd0f 178543 14991 154624 9% /var/tmp
> /dev/sd0e 178543 135085 34530 80% /usr
> /dev/sd0g 535279 1 508514 0% /altroot
> /dev/sd0h 535663 344017 164862 68% /usr/src
>
> Are those "md0" and "md1" disks the memory file system? If so, why are they
> apparently not instrumented?
No, the "mfs" is different from the "memory disks". The latter can hold
any file system; they're just a disk.
I don't know if the "md" driver has the requisite disk_busy()/disk_unbusy()
calls to instrument it.
Jason R. Thorpe thorpej@nas.nasa.gov
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