07-20-2010
Hardware RAID is handled by a specialized RAID controller card which does its own processing to make many devices act like one. This card is either configured through BIOS extensions(you may get an extra 'hit ESC to setup' message on boot) or through proprietary utilities. Once configured, the separate drives act like one device to the OS that you could do anything to you'd do with a normal drive, including boot from.
Software RAID on the other hand takes several devices already apparent to the OS and just accesses them through special routines, so they're treated as one device. The computer has to do all its own processing, so there may be some performance cost there. It may not be able to combine reads the way a hardware RAID could, i.e. you might not get double-speed reading from a mirrored array, but implementations vary. Because the drives still present themselves as many seperate drives to the kernel, it's harder to boot properly from a software RAID. I won't say impossible, but the kernel may need special configuration to properly autodetect and mount the array.
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1. Solaris
I don't understood why on SPARC-Platforms have not present RAID-Controller ? Sorry for my bad english, but it's crazy always setup software RAID !!! I whanna Hardware RAID and when i can find solution ? (7 Replies)
Discussion started by: jess_t03
7 Replies
2. Solaris
Hi,
I have t5120 sparc and I have 2 146 G drives in the system. I will be installing solaris 10 and also want the system mirrored using Hardware RAID "1"
The System did come preinstalled as it comes from sun. I did not do much on it.
I booted system using boot cdrom -s
gave format... (6 Replies)
Discussion started by: upengan78
6 Replies
3. Solaris
Hi,
I have a root with hardware RAID on c0t0d0 and c0t2d0. I would like to set the boot device sequence in OBP for both hdds.
I have checked in ls -l /dev/rdsk/ for the path of c0t2d0 but it does not exist. Can anyone shed some lights on this?
AVAILABLE DISK SELECTIONS:
0.... (12 Replies)
Discussion started by: honmin
12 Replies
4. Solaris
Hi,
I have a question. Do LiveUpgrade supports hardware raid?
How to choose the configuration of the system disk for Solaris 10 SPARC?
1st Hardware RAID-1 and UFS
2nd Hardware RAID-1 and ZFS
3rd SVM - UFS and RAID1
4th Software RAID-1 and ZFS
I care about this in the future to take... (1 Reply)
Discussion started by: bieszczaders
1 Replies
5. Hardware
Hi all
I've just received my T3-1. It has 8 disks and I would like to configure RAID1 on the disks. The Sun documentation states that you can either use the OpenBoot PROMP utility called Fcode or you can use software via the Solaris OS.
The documentation doesn't make it clear if:
1. The... (6 Replies)
Discussion started by: soliberus
6 Replies
6. Solaris
Server Model: T5120 with 146G x4 disks.
OS: Solaris 10 - installed on c1t0d0.
Plan to use software raid (veritas volume mgr) on c1t2d0 disk.
After format and label the disk, still not able to detect using vxdiskadm.
Question:
Should I remove the hardware raid on c1t2d0 first?
My... (4 Replies)
Discussion started by: KhawHL
4 Replies
7. Solaris
We have hardware RAID configured on our T6320 server and two LDOMs are running on this server. One of our disk got failed and replaced. After replacemnt the newly installed disk not detected by RAID controlled so Oracle suggested to upgrade the REM firmware. As this is the standalone production... (0 Replies)
Discussion started by: rock123
0 Replies
8. Solaris
Dear All ,
we have hardware raid 1 implemented on Solaris Disks.
We need to patch the Servers. Kindly let me know how to patch hardware raid implemented Servers.
Thanks...
Rj (7 Replies)
Discussion started by: jegaraman
7 Replies
9. Solaris
Dear All ,
Pl find the below command ,
# raidctl -l
Controller: 1
Volume:c1t0d0
Disk: 0.0.0
Disk: 0.1.0
Disk: 0.3.0
#
raidctl -l c1t0d0
Volume Size Stripe Status Cache RAID
Sub Size ... (10 Replies)
Discussion started by: jegaraman
10 Replies
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