12-30-2011
Best RAID settings for Debian Server? Help!! (1+0 or 5 or NAS)
I am installing a Debian Server on a:
HP Proliant DL380 G4
Dual CPU's 3.20 ghz / 800 mhz / 1MB L2
5120 MB RAM
6 hard disks on HP Smart Array 6i controller (36.4 GB Ultra320 SCSI HD each)
I will be using this server to capture VHS video, encode, compress, cut, edit, make DVD's, rip DVD's, re-encode some more, generally convert large uncompressed files as routine.
I have options:
#1) RAID set to RAID 5 (5 discs) with one spare (6th disk)
I liked this option, because of the spare. My disks are getting older, then are going to brake down, and I really need redundancy. However, I thought the parity processing would really slow down the encoding process. !!!
#2) RAID 1+0
I thought this would be faster, but I can either do 4 disks mirrored (leaves me really two disks size of 36.4GB x2)... Then I would have 1 spare, and one SCSI disk not being used sitting in the server. (some what of a waste, unless I need a quick replacement).
With RAID 5 I have 5 disks @ 36.4GB each and 1 spare
OR
With RAID 1+0 I have 2 disks @ 36.4GB each but I have two spares and mirroring.
I am also considering purchasing a NAS.
Given these scenarios (RAID 5...RAID 1+0....either 5 or 1+0 using a NAS)
What is the best configuration for my needs?
Thank you.
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MPT(4) BSD Kernel Interfaces Manual MPT(4)
NAME
mpt -- LSI Fusion-MPT SCSI/Fibre Channel driver
SYNOPSIS
mpt* at pci? dev ? function ?
scsibus* at mpt?
DESCRIPTION
The mpt driver provides support for the LSI Logic Fusion-MPT family of SCSI and Fibre Channel and SAS controllers:
o 53c1020 (Ultra320 SCSI)
o 53c1030 (Dual Ultra320 SCSI)
o AS1068 (SAS/SATA)
o FC909 (1Gb/s Fibre Channel)
o FC909A (Dual 1Gb/s Fibre Channel)
o FC919 (2Gb/s Fibre Channel)
o FC919X (2Gb/s Fibre Channel, PCI-X)
o FC929 (Dual 2Gb/s Fibre Channel)
o FC929X (Dual 2Gb/s Fibre Channel, PCI-X)
SEE ALSO
cd(4), ch(4), intro(4), pci(4), scsi(4), sd(4), siop(4), st(4), uk(4)
HISTORY
The mpt driver first appeared in NetBSD 2.0.
AUTHORS
The mpt driver was originally written for FreeBSD by Greg Ansley . It was ported to NetBSD by Jason R. Thorpe and contributed by Wasabi Sys-
tems, Inc.
BSD
February 16, 2009 BSD