[kaseleh]

I have two HDD. But, recently the Primary Master is not showing up in the boot priority list.

It is causing problems at boot time. My Linux OS in that HDD is not booting.

When, i boot from an OS in the primary slave or from a liveCd, i can mount the partitions from primary master. So, i guess, my HDD is working.

Please help.

 

[barillitos]

Do both hdd's have os partitions?

Example Hdd1: win xp
Hdd2: ubuntu

 

[kaseleh]

Yes, of course there are OS partitions on both of them.
Things were working fine. No Hardware change has been made. All of the sudden this problem is occuring.

  # fdisk -l

Disk /dev/sda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders, total 78165360 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: 0x45634534

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1              63    31888079    15944008+   7  HPFS/NTFS
/dev/sda2        61433854    78043135     8304641    5  Extended
/dev/sda3   *    42456960    61432559     9487800   83  Linux
/dev/sda4        31889408    42436607     5273600    6  FAT16
/dev/sda5        77723648    78043135      159744   82  Linux swap / Solaris
/dev/sda6        61433856    77721599     8143872   83  Linux

Partition table entries are not in disk order

Disk /dev/sdb: 80.0 GB, 80026361856 bytes
240 heads, 63 sectors/track, 10337 cylinders, total 156301488 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: 0x34534567

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1           15181    50682239    25333529+   f  W95 Ext'd (LBA)
/dev/sdb2   *    50682240   156295439    52806600    7  HPFS/NTFS
/dev/sdb5           15183    14348879     7166848+   7  HPFS/NTFS
/dev/sdb6        14348943    25613279     5632168+  83  Linux
/dev/sdb7        25613343    50682239    12534448+   7  HPFS/NTFS

 

[Tyree]

Brand & Model of both drives?
Remove the working Hdd and run the manufacturer's diagnostics on the problematic drive.