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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


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Old 06-14-2007, 01:37 AM   #1
Registered: Oct 2006
Posts: 75

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Help! with 3Ware SATA RAID Card

There were 2 SATA hd running RAID 1 on 3Ware RAID card.

Last week, the server was down, and I bought 2 new HD and reset the new HDs on RAID 1.

Now, I want to get some data on the previous mirrored HDs I find that I can't mount them individually.

I run kudzu and check the hwconf file. I'm sure system find the harddisk, and it's device sda.

I try to mount /dev/sda1 ~ sda3 /mnt It said the device not exist.

It seems I need to connect to the 3Ware RAID card to load the drive... Is it possible to get the data without the RAID card now?
Old 06-14-2007, 06:08 PM   #2
Registered: Feb 2002
Location: USA
Distribution: Fedora, CENTOS
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I ran into a similar problem with my 3ware card. The only solution that worked for me was to reconnect the drives to the 3ware card.

Old 06-14-2007, 06:42 PM   #3
LQ Newbie
Registered: Jan 2006
Distribution: Slackware 11.0
Posts: 23

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Although it's possible that you need the controller to correctly see the mirrored data on the drive, I would guess that either drive should be mountable by itself too. I'm no RAID expert, but I'm reasonably sure that this is true at least for software RAID 1.

The thing that makes me suspicious that something else is wrong is the 'device does not exist' error you mentioned.

The first thing is to be absolutely sure that your kernel is seeing the hard drive, and know what its device name is. Are you sure it's sda? You can either read the output of
$ dmesg
to figure it out, or post the output here and I'll try help out.

Secondly, what exactly are you typing to try mount the drive?
Old 06-14-2007, 11:18 PM   #4
Registered: Oct 2006
Posts: 75

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I just got informations about this.

1.The 3ware RAID card added some encrypt data on hd , so that the HD can't be mounted without the RAID card. As a result to protect the data.
I put HD to 3Ware raid card and the HD are able to mount.

2.And for software RAID in linux, 2 HD are totally same without encrypt and can be take off and mounted by other linux OS.

3.Not all hardware RAID card do encrypt on HD. I 've tried 2 promise RAID card running RAID1, each HD can be taken off and can be mounted on other system.


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