Thanks for the welcome and responding to my question.
The mount point is /media/cv4, and the fstab is as follows. The drive in question is commented out, because the drive disappears soon after getting mounted.
Code:
user@machine:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed.See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda1 during installation
UUID=6d9ae10a-51e5-48f4-ad84-eb4b3cc3fdeb / ext4 errors=remount-ro,usrquota,grpquota,acl,user_xattr 0 1
# swap was on /dev/sda5 during installation
UUID=49f61a8d-e073-4670-879d-f2f11598724b none swap sw 0 0
none /run/lock tmpfs rw,noexec,nosuid,nodev,size=52428800 0 0
UUID=3184ca13-558c-4962-9667-0022f917e379 /media/p ext4 defaults0 2
UUID=6c84e608-ba19-4dd1-ac4e-9c17c9cdb258 /media/q ext4 defaults0 2
UUID=74c1040e-09ba-4fc9-8183-a32ef4a888df /media/1 ext4 defaults0 2
UUID=9bebd92e-7fab-454d-b632-b0195d690413 /media/3 ext4 defaults0 2
UUID=2683782c-22c1-4a49-93c5-313748c97412 /media/9 ext4 defaults0 2
UUID=a9f0fe85-2d4d-4f59-9551-f295831c5865 /media/cv7 ext4 defaults0 2
UUID=167e63ab-e368-433a-8bbc-3b84e31ce6f3 /media/cv8 ext4 defaults0 2
UUID=715dd4be-7eea-4d43-9072-a211becefeff /media/3TB-a ext4 defaults0 2
UUID=56b7b4bb-0621-4bb4-b1de-9dfade5a8f0d /media/c3a ext4 defaults0 2
# UUID=16E0-1237 /media/hita-1 vfat iocharset=utf8 0 0
UUID=281081021080D868 /media/hita-b ntfs-3g defaults0 0
UUID=418fcfbf-bd22-4dfb-99ea-0ffe13549dff /media/cof ext4 defaults0 2
# UUID=975033a1-7346-4896-9bda-24f732594a9c /media/cv4 ext4 defaults 0 2
UUID=c32fa77e-cb81-465d-8015-456370e8cc0e /media/cv5 ext4 defaults0 2
UUID=888b513f-f38f-4be3-b066-d0077571f73a /media/cv6 ext4 defaults0 2
user@machine:~$
When not mounted:
Code:
user@machine:~$ mount
/dev/sda1 on / type ext4 (rw,errors=remount-ro,usrquota,grpquota,acl,user_xattr)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=52428800)
none on /run/shm type tmpfs (rw,nosuid,nodev)
/dev/sdb1 on /media/p type ext4 (rw)
/dev/sdc1 on /media/q type ext4 (rw)
/dev/sdn1 on /media/hita-b type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
/dev/sdd1 on /media/3 type ext4 (rw)
/dev/sdi1 on /media/3TB-a type ext4 (rw)
/dev/sdh1 on /media/cv5 type ext4 (rw)
/dev/sdf1 on /media/cv6 type ext4 (rw)
/dev/sdo1 on /media/cv8 type ext4 (rw)
/dev/sdl1 on /media/c3a type ext4 (rw)
/dev/sdm1 on /media/cof type ext4 (rw)
/dev/sdk1 on /media/1 type ext4 (rw)
/dev/sdg1 on /media/9 type ext4 (rw)
/dev/sde1 on /media/cv7 type ext4 (rw)
gvfs-fuse-daemon on /home/sokoban/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=sokoban)
user@machine:~$
When mounted (as you can see, ls results in I/O error):
Code:
user@machine:~$ sudo mount -U 975033a1-7346-4896-9bda-24f732594a9c /media/cv4
user@machine:~$ mount
/dev/sda1 on / type ext4 (rw,errors=remount-ro,usrquota,grpquota,acl,user_xattr)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=52428800)
none on /run/shm type tmpfs (rw,nosuid,nodev)
/dev/sdb1 on /media/p type ext4 (rw)
/dev/sdc1 on /media/q type ext4 (rw)
/dev/sdn1 on /media/hita-b type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
/dev/sdd1 on /media/3 type ext4 (rw)
/dev/sdi1 on /media/3TB-a type ext4 (rw)
/dev/sdh1 on /media/cv5 type ext4 (rw)
/dev/sdf1 on /media/cv6 type ext4 (rw)
/dev/sdo1 on /media/cv8 type ext4 (rw)
/dev/sdl1 on /media/c3a type ext4 (rw)
/dev/sdm1 on /media/cof type ext4 (rw)
/dev/sdk1 on /media/1 type ext4 (rw)
/dev/sdg1 on /media/9 type ext4 (rw)
/dev/sde1 on /media/cv7 type ext4 (rw)
gvfs-fuse-daemon on /home/sokoban/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=sokoban)
/dev/sdj1 on /media/cv4 type ext4 (rw)
user@machine:~$
user@machine:~$ ls /media/cv4
ls: reading directory /media/cv4: Input/output error
user@machine:~$
I don't see any noteworthy entry in /var/log/dmesg.
I have recreated partition table (GPT) and deleted/recreated partition, but no improvement.
What's the difference between a mounted partition and an umounted drive? Although SMART seems ok, the HDD (not just the mount point) drops off the system once mounted - might be some bizarre HDD FW bug/HW failure that "raise shield (or perhaps goes in to sleep mode?)" at the first sign of rw access? I mean, even if there were bad sectors and things and ls gets I/O error, shouldn't palimpsest continue to be able to access the HDD's SMART?
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