rootvg and hardware raid1

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Operating Systems AIX rootvg and hardware raid1
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Old 09-11-2009
rootvg and hardware raid1

Good Morning,

We have a JS22 blade that we will be loading AIX5.3 onto it. We just discovered that the JS22 will only support one drive, so we are planning on booting this blade from the Fiber Channel SAN. Orginally we used 2 physical drives and set up RAID 1 and presented the logical drive to the JS22. The consultant that is setting up the system told us that this would not work for rootvg and that in order for the system to work properly AIX needs to see both drives. I have limited knowledge of unix/linux, but i find it hard to believe that a hardware based raid solution would not work. Can anyone shed any light on this for me?

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chs(7D) 							      Devices								   chs(7D)

chs - IBM ServeRAID PCI host adapter driver DESCRIPTION
The chs driver is the IBM ServeRAID PCI controller driver. PRECONFIGURATION
Known Problems and Limitations To prevent data loss, a SCSI disk drive that is not defined as part of any physical pack within a logical drive will not be accessible through the Solaris operating environment. CONFIGURATION
Auto-configuration code determines whether the adapter is present at the configured address and what types of devices are attached to it. The IBM ServeRAID is primarily used as a disk array (system drive) controller. To configure the attached disk arrays, you must configure the controller (using the configuration utilities provided by the hardware manu- facturer) before booting the Solaris operating environment You use the configuration utilities to set RAID levels, stripe parameters, cache mechanisms and perform other functions. For more information, see the user manual supplied with your hardware. FILES
/kernel/drv/chs.conf chs configuration file /dev/dsk/cndn[s|p]n block device /dev/rdsk/cndn[s|p]n raw device where: cn controller n dn LUN n (0-7) sn UNIX system slice n (0-15) pn fdisk(1M) partition(0) ATTRIBUTES
See attributes(5) for a description of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Architecture |x86 | +-----------------------------+-----------------------------+ SEE ALSO
fdisk(1M), attributes(5), cmdk(7D) SunOS 5.10 27 November 2000 chs(7D)

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