Remount file system

If fsck runs clear, try to remount as follows:

mount -F ufs -o rw,remount  /usr

Hi,

1. Can I run this mount without the Solaris boot disk?  My doubt is if I can remount a file system (/usr) where the commands are located. 

>> Logically yes, my recommendation here (if possible) would be to bring system to single user mode, unencapsulate. boot via cd or other method & run full fsck on slices. If fsck founds it clean, ensure system boots up in unencapsulated mode, encapsulate again. This is a lenghty way to tackle this problem but would be consistent, this will find the errors & fix the problem. You can alternatively attempt a remount but if there are issues at disk layer, this issue may reoccur.

2. The fsck would be an fsck -F ufs  /usr ?

>> yes, first attempt a  fsck -F ufs -n <raw device>, this will tell you what errors are available but won't make any changes to filesystem. If the changes are minimal & FS is in recoverable position, you can replace -n with -y switch & re run fsck.

3. There is a way to verify why this file system changed to read only?

>> you will need to refer to system logs, most likely reason is IO errors on filesystem. Try to look through messages file & find if there are any disk/IO related errors.

G