Using Ubuntu 12.04 64 bit, I had the Ubuntu 12.04 on one of my two original 320 Gb HD, and a plethora of old backup files on the other. A few years ago, I added a 1 Tb HD and have been saving my recent backups to it using Back in Time.
As of yesterday, the 1 Tb HD does not appear in devices. I checked the power and data plugs to this drive and they appear normal. Could the drive have suddenly gone dead or is there something else that I should check?
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002be96
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1949333503 974665728 83 Linux
/dev/sda2 1949335550 1953523711 2094081 5 Extended
/dev/sda5 1949335552 1953523711 2094080 82 Linux swap / Solaris
Disk /dev/sdb: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002e221
Device Boot Start End Blocks Id System
/dev/sdb1 * 63 353703104 176851521 83 Linux
/dev/sdb3 353703934 625137344 135716705+ 5 Extended
/dev/sdb5 614020428 625137344 5558458+ 82 Linux swap / Solaris
/dev/sdb6 353703936 609830911 128063488 83 Linux
/dev/sdb7 609832960 614019071 2093056 82 Linux swap / Solaris
Partition table entries are not in disk order
Disk /dev/mapper/cryptswap1: 2144 MB, 2144337920 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4188160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0f1d0188
Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table
brooks@brooks-System-Product-Name:~$ Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002be96
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1949333503 974665728 83 Linux
/dev/sda2 1949335550 1953523711 2094081 5 Extended
/dev/sda5 1949335552 1953523711 2094080 82 Linux swap / Solaris
Disk /dev/sdb: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002e221
Device Boot Start End Blocks Id System
/dev/sdb1 * 63 353703104 176851521 83 Linux
/dev/sdb3 353703934 625137344 135716705+ 5 Extended
/dev/sdb5 614020428 625137344 5558458+ 82 Linux swap / Solaris
/dev/sdb6 353703936 609830911 128063488 83 Linux
/dev/sdb7 609832960 614019071 2093056 82 Linux swap / Solaris
Partition table entries are not in disk order
Disk /dev/mapper/cryptswap1: 2144 MB, 2144337920 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4188160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0f1d0188
Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 929.5G 0 part /
├─sda2 8:2 0 1K 0 part
└─sda5 8:5 0 2G 0 part
└─cryptswap1 (dm-0) 252:0 0 2G 0 crypt [SWAP]
sdb 8:16 0 298.1G 0 disk
├─sdb1 8:17 0 168.7G 0 part
├─sdb3 8:19 0 1K 0 part
├─sdb5 8:21 0 5.3G 0 part
├─sdb6 8:22 0 122.1G 0 part
└─sdb7 8:23 0 2G 0 part
sr0 11:0 1 1024M 0 rom
sr1 11:1 1 1024M 0 rom
sudo fdisk -l,lsblk. Alsodmesg. – Braiam Aug 17 '13 at 01:47