How to Tell if a Server is RAID 5 enabled...
Posted on 2001-08-14
I have two dedicated web servers that are managed by a hosting company. We were guaranteed that the servers would be configured for RAID 5 and fully clustered for fail over purposes. Not that I don't trust them, but I want to ensure that the systems are working properly. I would like to find out how a RAID 5 clustered system should "look" and if my system is not correct, how should I explain to them what needs fixed. I would like make this worth a good amount of points in hopes of a detailed explanation, but any assistance is appreciated.
I have root access and I know that each system has the following configuration:
- Dual PIII 1Ghz Processors
- Three 18Gb SCSI UltraWide Drives
- Both show a RAID Controller ERROR under Other Devices but have a QLOGIC QLA12160, 64 BIT Dual PCI 160M SCSI HBA controller installed under SCSI & RAID devices.
One system is used for a web server and the other for SQL server, but SQL server is only installed on one machine. If the servers are supposed to be clustered, shouldn't SQL server be installed on both machines?
For one system the disk manager shows:
Disk 0 - Drive C: - Type=Basic - Layout=Partition
Disk 1 - Drive E: - Type=Dynamic - Layout=Simple
DIsk 2 - Drive F: - Type=Dynamic - Layout=Simple
For the other system, the disk manager shows:
Disk 0 - Drive C: - Type=Dynamic - Layout=Mirror
Disk 1 - Drive C: - Type=Dynamic - Layout=Mirror
Disk 2 - Drive E: - Type=Dynamic - Layout=Simple
I was told that one complete system could go down along with two of the hard drives from the other system and my sites would still stay up. Does this look correct for that type of configuration?