CentOS - Feb 2007 - Could not mount SATA disk as module scsi_hostadapter is not loaded, although present in modules.conf

Hi people,

I installed a via SATA controller in a CentOS release 3.8 (Final) - I
needed additional disk space. After the first boot, the kudzu service,
added the following line to /etc/modules.conf:

alias scsi_hostadapter sata_via

and I rebooted. After reboot in dmesg one can see:

scsi0 : sata_via
scsi1 : sata_via
  Vendor: ATA       Model: SAMSUNG HD080HJ   Rev: WT10
  Type:   Direct-Access                      ANSI SCSI revision: 05
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
SCSI device sda: 156301488 512-byte hdwr sectors (80026 MB)
sda: sda1 sda2 < sda5 > sda3
 scsi : 0 hosts left

But the /dev/sda device is not present in the system. If I issue the command:


[root at bdc root]# fdisk /dev/sda

Unable to open /dev/sda


I found out that if at that point I issue the command:

[root at bdc root]# modprobe scsi_hostadapter

the /dev/sda is inserted in the system and I can access it using
fdisk. It appears to me that scsi_hostadapter is initially loaded
during boot, later unloaded - therefore the drive is missing.

Currently I patch the situation with a file /etc/rc.modules with the
following contents:

#! /bin/sh

modprobe scsi_hostadapter

However I assume that this is not the correct way to fix this. Maybe I
need additional lines in modules.conf?

Best regards,
alex

Alexander Georgiev wrote:
> Hi people,
>
> I installed a via SATA controller in a CentOS release 3.8 (Final) - I
> needed additional disk space. After the first boot, the kudzu service,
> added the following line to /etc/modules.conf:
>
> alias scsi_hostadapter sata_via
>
> and I rebooted. After reboot in dmesg one can see:
>
> scsi0 : sata_via
> scsi1 : sata_via
>  Vendor: ATA       Model: SAMSUNG HD080HJ   Rev: WT10
>  Type:   Direct-Access                      ANSI SCSI revision: 05
> Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
> SCSI device sda: 156301488 512-byte hdwr sectors (80026 MB)
> sda: sda1 sda2 < sda5 > sda3
> scsi : 0 hosts left
>
> But the /dev/sda device is not present in the system. If I issue the 
> command:
>
>
> [root at bdc root]# fdisk /dev/sda
>
> Unable to open /dev/sda
>
>
> I found out that if at that point I issue the command:
>
> [root at bdc root]# modprobe scsi_hostadapter
>
> the /dev/sda is inserted in the system and I can access it using
> fdisk. It appears to me that scsi_hostadapter is initially loaded
> during boot, later unloaded - therefore the drive is missing.
>
> Currently I patch the situation with a file /etc/rc.modules with the
> following contents:
>
> #! /bin/sh
>
> modprobe scsi_hostadapter
>
> However I assume that this is not the correct way to fix this. Maybe I
> need additional lines in modules.conf?
>
> Best regards,
> alex
Alex,

Possibly rebuilding your inird will correct this.  I'm not sure if kudzu 
does this or not, but  mkinitrd will add the correct scsi_hostadapter to 
the modules that gets loaded as part of the initial RAMDISK (see the man 
mkinitrd).

Bob...