RE: shared SCSI devices

Hi !

This is a quite lately answer but perhaps still useful...

We are using a shared storage solution from HP. The shared disks are in a 
HP Rack Storage/12, equipped with two scsi cards and configured in cluster 
mode.
The RS/12 is connected to two nodes equipped each with one HP NetRaid 3si 
SCSI adapter configured to handle the disks in RAID 5.
The RAID 5 disk is seen as a single disk from each node.
There are several partitions on this disk, managed with lvm.
The only thing that we need to ensure to properly take over is that one 
partition is mounted only once. Otherwise, the files may (surely) be 
corrupted (I tested that :)  ).

Note that the Netraid 3si are more or less supported by HP for Linux 
environment (it depends of the person you are talking to) and that 
Netraid3si are sold with a firmware that doesn't support such a cluster 
configuration. They need to be flashed with a specific firmware. The 
regular way to get this firmware is to buy the solution from a reseller   
certified by HP to be capable of installing such a configuration but if you 
stress enough HP they can give you this firmware.

We have installed this solution last december and it works fine, except 
that we had problems to configure failsafe, so we manually takeover when 
necessary until we have time to take a look at failsafe again...  :(


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Message: 1
From: Volker Pense <[email protected]>
Organization: PROFI Engineering Systems AG
Date: Tue, 9 Jul 2002 11:38:42 +0200
To: [email protected]
Subject: [LinuxFailSafe] shared SCSI devices

Hi,
has anyone a list which SCSI Adapters allow a shared logical Volume under
Linux for HA Takeover. For Example IBM ServeRAID does not.

--
Volker Pense
Systemingenieur TIVOLI,LINUX,AIX

Otto-Rohm-Str.18
Tel.:+49(0)6151/8290-7725
Fax :+49(0)6151/8290-7610
Mobil:0171/7991332
eMail:[email protected]





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