artspace:/home/hall# cd;mkdir test123;mount /dev/sda4 test123;dmesg|tail
mount: you must specify the filesystem type
sda: Write Protect is off
sda: Mode Sense: 43 00 00 00
sda: assuming drive cache: write through
SCSI device sda: 246784 512-byte hdwr sectors (126 MB)
sda: Write Protect is off
sda: Mode Sense: 43 00 00 00
sda: assuming drive cache: write through
 sda: sda4
 sda4: <bsd: sda5 >
sd 0:0:0:0: Attached scsi disk sda
artspace:~# cd;mkdir test123;mount /dev/sda4 test123;dmesg|tail
mkdir: cannot create directory `test123': File exists
mount: special device /dev/sda4 does not exist
VFS: Can't find ext3 filesystem on dev sda5.
VFS: Can't find ext3 filesystem on dev sda5.
VFS: Can't find an ext2 filesystem on dev sda5.
VFS: Can't find an ext2 filesystem on dev sda5.
ReiserFS: sda5: warning: sh-2021: reiserfs_fill_super: can not find reiserfs on sda5
ReiserFS: sda5: warning: sh-2021: reiserfs_fill_super: can not find reiserfs on sda5
SGI XFS with ACLs, security attributes, realtime, large block numbers, no debug enabled
SGI XFS Quota Management subsystem
JFS: nTxBlock = 983, nTxLock = 7871
usb 1-2.2: USB disconnect, address 3
artspace:~# mount*
bash: mount*: command not found