[LinuxFailSafe] Re: LinuxFailSafe digest, Vol 1 #580 - 1 msg

[Robert Meiners]

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Am Mittwoch, 5. November 2003 20:00 schrieb=20
> "Elliott Perkins" <linuxfs@infinitefunctions.com>

Hello Elliot,=20
i will give you some answers by your questions

> So, my questions:

1. Is anyone running a system using a shared SCSI bus?
Principally this is not recommended with two exceptions.
=46or testing or in combination with GDT-Cluster-controllers.

1a. What SCSI adapter are you using in the nodes?
=46or testing use two of the same Type, or even GDT-Clustercontrollers.

1b. What other hardware are you using with regard to the shared disk?
By using SCSI i recommend a RAID-Array with built-in Controller.
It's relibale and the cheapest Thing you can use is a IDE2SCSI-Array e.g. l=
ike=20
from IFT. By this constellation the servers need only a standard externela=
=20
SCSI-controller-port.
The best way is using a Fibre-Channel-Array. By two nodes you can use=20
Cross-links, it saves the expansive switch. Or by using a switch you can us=
e=20
more nodes, e.g. for a N:1 Cluster

1c. What Linux distribution are you running?
We used Redhat 7.x until now. Packeges for Debian a near immpossible to bui=
ld
in cause of some strange libary-dependencies.

2. What are the minimum hardware requirements for sharing a SCSI disk?
Two controller of the same Typ, two Cables and an externel Disk.
You have to change the ID of one of the Controllers.
I use this for Tests or Demos.

2a. I assume it is: 2 SCSI adapters, cables, shared SCSI bus, SCSI disk, am
I wrong? No

2b. How am I wrong?
Ask if you thinking this.

Greetings=20

Robert

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* Dipl.-Inform. R. Meiners <meiners@GONICUS.de> (Senior Consultant)
* GONICUS GmbH * Moehnestrasse 11-17 * D-59755 Arnsberg
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