Notes On Hardware Raid - Fujitsu M10 Product Notes

Notes on hardware RAID

There are the following precautions when you use hardware RAID.
About hardware RAID management utility
When you use the hardware RAID function of a SPARC M10 system, we
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recommend using the RAID management utility (sas2ircu: SAS2 Integrated RAID
Configuration Utility) provided by the LSI Corporation, in order to manage the
hardware RAID environment. In the OpenBoot PROM environment, you can set
the hardware RAID but cannot manage it.
For details on how to obtain the RAID management utility, see the LSI Corporation
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website described in "12.2 Configuring Hardware RAID" in SPARC M10 Systems
System Operation and Administration Guide. For details on how to use this, see SAS2
Integrated RAID Solution User Guide on the same website.
If the RAID volume fails, you can specify the failed disk by using the RAID
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management utility.
The RAID management utility is used in the Oracle Solaris OS environment
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logged in with an account with root privilege. Therefore, the RAID management
utility should be operated by a system administrator.
Notes when using hardware RAID
Perform backup of important data and programs on a regular basis. For some
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errors, you may need to restore data or programs from a backup media by
reconstructing the hardware RAID.
We recommend using an uninterruptible power supply (UPS) in order to secure
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the data in the system in case of power outage.
If a high availability such as duplication of controller or data path is required for
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the hardware RAID function, install a dedicated RAID system.
Notes when configuring/removing hardware RAID
When configuring/removing the hardware RAID, preserving data on a disk is not
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guaranteed. Be sure to perform backup of data when you initially configure the
hardware RAID to the system that is in operation or remove an installed hardware
RAID. After configuring the hardware RAID, you need to newly install data or
restore data from a backup media.
When you configure the hardware RAID, the RAID volume becomes smaller in
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size than the original disk.
Notes on operating hardware RAID
System may slow down because the hardware RAID controller cannot completely
judge whether a disk has a failure. When you maintain it in this state, follow the
procedures below. Be sure to take backup of data before performing the procedures
because the hardware RAID will be removed.
Fujitsu M10/SPARC M10 Systems Product Notes for XCP Version 2043 ･ October 2013
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