Solaris

unix@test1 >ls -la /var/spool
/var/spool: I/O error

#does this command at least show spool as a directory and run as a directory?
ls -lad /var    
# if it does try
cd /var/spool
# if no errors try this  and show full output, including errors
ls -l

uname -a

unix@test1 >ls -lad /var  
drwxr-xr-x  46 root     sys         1024 Apr  2  2007 /var

unix@test1 >cd /var/spool
cd: error retrieving current directory: getcwd: cannot access parent directories: I/O error

unix@test1 >uname -a
SunOS test1 5.10 Generic_141414-01 sun4v sparc SUNW,Sun-Fire-T200

pkaturi@us1096ldap01 >df -h       
Filesystem             size   used  avail capacity  Mounted on
/dev/md/dsk/d100       4.9G   402M   4.5G     9%    /
/devices                 0K     0K     0K     0%    /devices
ctfs                     0K     0K     0K     0%    /system/contract
proc                     0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                    12G   1.3M    12G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
sharefs                  0K     0K     0K     0%    /etc/dfs/sharetab
/dev/md/dsk/d130       9.8G   4.2G   5.6G    43%    /usr
/platform/SUNW,Sun-Fire-T200/lib/libc_psr/libc_psr_hwcap1.so.1
                       4.9G   402M   4.5G     9%    /platform/sun4v/lib/libc_psr.so.1
/platform/SUNW,Sun-Fire-T200/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1
                       4.9G   402M   4.5G     9%    /platform/sun4v/lib/sparcv9/libc_psr.so.1
fd                       0K     0K     0K     0%    /dev/fd
/dev/md/dsk/d140       7.9G   4.6G   3.2G    60%    /var
swap                    15G   2.6G    12G    18%    /tmp
swap                    12G    16K    12G     1%    /var/run
/dev/dsk/c0t2d0s1       39G    13G    26G    34%    /BACK
/dev/md/dsk/d150       8.9G   1.3G   7.5G    15%    /opt
/dev/md/dsk/d120        30G   5.7G    24G    20%    /data
/dev/dsk/c0t2d0s3       12G   4.6G   7.3G    39%    /home
/dev/dsk/c0t2d0s4      9.8G   4.6G   5.1G    48%    /photos
/dev/dsk/c0t3d0s3       17G    49M    17G     1%    /var/core
/dev/dsk/c0t3d0s4       15G   1.3G    13G    10%    /var/spool
/dev/dsk/c0t3d0s1       30G   4.1G    25G    14%    /LOG