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Full Discussion: Help Setting up Linux Raid Server
Operating Systems Linux Help Setting up Linux Raid Server Post 302518422 by lorewap3 on Friday 29th of April 2011 02:55:25 PM
Old 04-29-2011
Question Help Setting up Linux Raid Server
I just built a home computer with 3TB hard drives I wanted to set up in a RAID 5 and load Ubuntu server onto it.

The first thing I did was set up the drives in a RAID 5 using just the motherboard chipset software to do it, so a 'hardware' RAID basically.

I installed Windows first to see if all the hardware works ok (that seemed the easiest way to verify it) and with the exception of the ethernet card (which needed a driver disk to work) everything was plug n' play and worked wonderfully. After that I booted the Windows install disk again to delete the partitions, hoping Ubuntu 10.10 server would create its own.

The problem I'm having is no matter what I've tried (deleting and recreating the RAID 5 setup, departitioning the drives), whenever I try to install Ubuntu it won't recognize the RAID as a valid disk. Ironically, it did at first, because I installed windows to verify the hardware. The ethernet card wasn't working automatically in the Ubuntu setup, (although it found the unformatted RAID drive), so I installed windows and figured out it was just the drivers that needed to be installed.

So now when I try to install Ubuntu, it finds the ethernet card perfectly and connects to the internet during the installation...but that actually stinks because it's telling me it's still accessing the drivers from the drives that I thought I formatted. Once it gets to the storage part of the installation afterwards, it can't find the RAID drive anymore. I tells me to choose a disk from the list, but the list is blank. So I can't install on it.

If I remove the RAID entirely and just keep the drives as 3 separate IDE drives, it finds every drive perfectly and can install to either one I choose. But I don't want this, I definitely need them RAIDed.

I would appreciate any advice at all on this, or even suggestions on another way of doing it. I've heard many people claim to dislike hardware RAIDs for linux servers and recommend using a software RAID instead. I am new to either, so I'd be happy to consider a software RAID if I knew it would be better/easier.

Any suggestion on a distrobution would be nice, too. I think I like the KDE interface, making me consider Kubuntu, but primarily I just want a server with the trimmings to access it from afar...LAMP,Email,SSH, and Remote Desktop.

Thanks for any advice!

Will P.
 

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LEARN ABOUT DEBIAN

asr

ASR(4)							   BSD Kernel Interfaces Manual 						    ASR(4)

NAME

     asr -- driver for Adaptec I2O based SCSI/ATA host bus adapters

SYNOPSIS

     device asr

DESCRIPTION

     The Adaptec asr driver provides access to disks and disk arrays controlled by I2O based host bus adapters and SmartRAID SCSI RAID adapters
     through the standard SCSI disk da(4) interface.

     The supported adapters provide 64 bit PCI, Compact PCI, Zero Channel PCI, and up to four channels of Ultra2, Ultra 160, or Ultra320 SCSI, or
     two channels of 1GB Fibre.  All support RAID-0, RAID-1, RAID-10, RAID-5 and RAID-50 arrays.  All SCSI target types are supported.	For the
     ATA based controllers, one IDE drive per channel is supported.  Hot-swapping of IDE drives is not supported at this time.

     All host bus adapters must be configured before they can be used with any operating system.  Please contact Adaptec directly to obtain the
     latest information on configuration utilities for the adapters.  Currently there are both a Motif based GUI configuration utility and a CLI
     based configuration utility available from the Adaptec Web site.  The cards and arrays can also be configured via the BIOS based configura-
     tion tool (SMOR).

HARDWARE

     The adapters currently supported by the asr driver include the following:

     o	 Adaptec Zero-Channel SCSI RAID 2000S, 2005S, 2010S, 2015S
     o	 Adaptec SCSI RAID 2100S, 2110S
     o	 Adaptec ATA-100 RAID 2400A
     o	 Adaptec SCSI RAID 3200S, 3210S
     o	 Adaptec SCSI RAID 3400S, 3410S
     o	 Adaptec SmartRAID PM1554
     o	 Adaptec SmartRAID PM1564
     o	 Adaptec SmartRAID PM2554
     o	 Adaptec SmartRAID PM2564
     o	 Adaptec SmartRAID PM2664
     o	 Adaptec SmartRAID PM2754
     o	 Adaptec SmartRAID PM2865
     o	 Adaptec SmartRAID PM3754
     o	 Adaptec SmartRAID PM3755U2B / SmartRAID V Millennium
     o	 Adaptec SmartRAID PM3757
     o	 DEC KZPCC-AC (LVD 1-ch, 4MB or 16MB cache), DEC KZPCC-CE (LVD 3-ch, 64MB cache), DEC KZPCC-XC (LVD 1-ch, 16MB cache), DEC KZPCC-XE (LVD
	 3-ch, 64MB cache) -- rebadged SmartRAID V Millennium

FILES

     /dev/asr*	Adaptec SCSI RAID control nodes

NOTES

     The ATA based controllers present their devices as SCSI-like devices via CAM.  For IDE drives attached to these cards, a subset of standard
     SCSI commands and mode pages are understood via translation performed in the card's firmware.

SEE ALSO

     da(4)

HISTORY

     The asr (Adaptec SCSI RAID) driver first appeared as the dpti2o driver under BSDi BSD/OS 3.2, then under FreeBSD 2.2.8 and was ported over to
     the CAM layer represented in 4.0.

AUTHORS

     The asr driver was kindly donated by Adaptec and is maintained by Mark Salyzyn <mark_salyzyn@adaptec.com>.  This manual page was written by
     Mark Salyzyn and fixed up by Jeroen Ruigrok van der Werven <asmodai@FreeBSD.org>.

BSD
								   July 14, 2004							       BSD
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