Summary(updated): Problems with root filesystem writes

Just a final update with the resolution to the problem.

It was a hardware issue. The 73Gb drives that arrived with the system
were not Sun disks. They were Seagate Part # ST373307FC which is the
same drive Sun ships with the Blade 1000. However, Sun slightly
modifies the firmware and the stock Seagate unit won't always work.

That was the cause of all the disk errors. Switching to a 9Gb Sun hard
drive(X6709A) made all the problems disappear.

Thanks,
   -Aaron Taylor

Original Question:

> Hi All,
>
> I've got a problem with a new Sun Blade 1000 machine I setup. It's
> Solaris 10 update 1(1/06). Nobody, including root, can write to the
> root filesystem. Other slices are fine. People can write to /usr,
> /home, etc, etc, etc just fine.
>
> / is mounted read-write as shown in the "mount" command with /usr for
> comparison:
>
> / on /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w21000004cfe6917c,0:a
> read/write/setuid/devices/dev=1d80008 on Wed Dec 31 16:00:00 1969
> /usr on /dev/dsk/c1t1d0s3
>
read/write/setuid/devices/intr/largefiles/logging/xattr/onerror=panic/dev=1d8
000b
> on Sun Feb 26 14:43:17 2006
>
> However, comparing it to /usr, you can see several differences. First,
> it's the actual hardware path that is mounted instead of the link in
> /dev which then normally points to the hardware path in /devices.
> Second, it shows the mount date as the beginning of the UNIX clock. I
> would think that even if the clock was starting when the system first
> got AC power, it would at least be 15-20 seconds of runtime until it
> got around to mounting disks. You can also see logging is not enabled
> on /. I was under that belief that UFS logging was enabled by default
> on all UFS filesystems in Solaris 10.
>
> The appropriate entries out of /etc/vfstab:
>
> /dev/dsk/c1t1d0s0       /dev/rdsk/c1t1d0s0      /       ufs     1
>  no      -
> /dev/dsk/c1t1d0s3       /dev/rdsk/c1t1d0s3      /usr    ufs     1
>  no      -
>
> I tried reinstalling the OS and the same behaviour is occuring on both
installs.
>
> Does anyone have any ideas what is causing this?
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