Re: Not all IDE hard disks are detected by my BIOS

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On 8/18/06, Mikkel L. Ellertson <mikkel@xxxxxxxxxxxxxxxx> wrote:
>>>> At boot time, my new BIOS is unable to detect 2 of my 3 IDE hard
>>>> disks. However, I can access to all of them from FC5. Is there
>>>> something that I can do to have the BIOS detecting all my IDE hard
>>>> disks?
>>>>
>>> I would check that you have the jumpers set correctly on the hard
>>> drives. I had an issue with a Western Digital drive that I had set to
>>> slave when it was actually the master and the BIOS would not pick it up.
>>> I am assuming these are PATA not SATA drives.
>> Thanks, Ryan and Tony. If the hard drives were not correctly connected
>> I would not be able to boot in them, is not it?
>
> Right.  But that doesn't say that that the drives are on the connections
> where the kernel says there are no drives.  The drives are connected
> elsewhere, where the kernel reports them to be.  Other connections may be
> unused.
>
One point to keep in mind - it is the BIOS, and not the kernel that
is generating the messages. It sounds like the BIOS is set to check
for drives on all the IDE interfaces every time it boots, and not
all interfaces have drives on them. There is nothing wrong with
this. I normally turn this off, and set the drive types in the BIOS,
but I also know to go into the BIOS and change things if I change
drives.

One other thing to keep in mind is that we do not know if there are
really 3 IDE drives. From what the OP has said, I am not sure how
much he really knows about his hardware. It would be interesting to
see the output of "fdisk -l" when run as root. This would tell us
both how many driver there are, and what interfaces they are on.

OK, the result of 'fdisk -l' is:

# /sbin/fdisk -l

Disk /dev/hda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1        3187    25599546    c  W95 FAT32 (LBA)
/dev/hda2            3188        3200      104422+  83  Linux
/dev/hda3            3201       14593    91514272+  8e  Linux LVM

Disk /dev/hdb: 81.9 GB, 81964302336 bytes
255 heads, 63 sectors/track, 9964 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot      Start         End      Blocks   Id  System
/dev/hdb1   *           1         764     6136798+  83  Linux
/dev/hdb2             765        9964    73899000    5  Extended
/dev/hdb5             765         904     1124518+  82  Linux swap / Solaris
/dev/hdb6             905        9964    72774418+  83  Linux

Disk /dev/hde: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot      Start         End      Blocks   Id  System
/dev/hde1   *           1       10000    80324968+  83  Linux
/dev/hde2           10001       19457    75963352+  8e  Linux LVM

Disk /dev/dm-0: 92.5 GB, 92576677888 bytes
255 heads, 63 sectors/track, 11255 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-1 doesn't contain a valid partition table

Paul


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