08-25-2009
Also, please tell me that your "backups" are also going to another spot other than just a RAID 5 set.
Yes, 32-64K would be good for non sequential (sequential would be something like linear video or audio files). 128K would possibly be ideal if your files are greater than 8MB on average.
However, as others have stated, RAID 0, while improving performance, will actually increase the likelihood of failure from even having 1 drive.
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IIR(4) BSD Kernel Interfaces Manual IIR(4)
NAME
iir -- Intel Integrated RAID controller and ICP Vortex driver
SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file:
device pci
device scbus
device iir
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
iir_load="YES"
DESCRIPTION
The iir driver claims to interface with the Intel integrated RAID controller cards, and all versions of the ICP Vortex controllers (including
FC).
HARDWARE
Controllers supported by the iir driver include:
o Intel RAID Controller SRCMR
o Intel Server RAID Controller U3-l (SRCU31a)
o Intel Server RAID Controller U3-1L (SRCU31La)
o Intel Server RAID Controller U3-2 (SRCU32)
o All past and future releases of Intel and ICP RAID Controllers.
o Intel RAID Controller SRCU21 (discontinued)
o Intel RAID Controller SRCU31 (older revision, not compatible)
o Intel RAID Controller SRCU31L (older revision, not compatible)
The SRCU31 and SRCU31L can be updated via a firmware update available from Intel.
SEE ALSO
cam(4), pass(4), xpt(4), camcontrol(8)
AUTHORS
The iir driver is supported and maintained by Achim Leubner <Achim_Leubner@adaptec.com>.
This manual page was written by Tom Rhodes <trhodes@FreeBSD.org> and is based on information supplied by the driver authors and the website
of Mike Smith <msmith@FreeBSD.org>.
BSD August 8, 2004 BSD