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UNIX for Dummies Questions & Answers
UNIX Admin asking for Swap LUN
Post 302223775 by leftyfork on Monday 11th of August 2008 10:46:41 AM
08-11-2008
UNIX Admin asking for Swap LUN
Hello UNIX Experts.
I am responsible for our company's LAN and Clariion SAN environments. My primary responsibilities have always been on the Windows server side for disk on the SAN. I no nothing about UNIX. I think it might be a rock group.?
I am now being asked to provide a new disk/LUN on our Clariion, which houses all UNIX host data as well. The disk is going to provide adequate sizing for what I am told is the UNIX "swap space". I have no idea what this "swap space" acts like or does, and I would appreciate an explanation so that I can create an appropriate LUN.
On the Clariion, my options include choosing a separate bus, enclosure and physical disk drives which I might do anyway, but should I choose RAID 1 or RAID5?
In addition, what about providing this "swap space" LUN on a completely separate fiber channel adapter in the UNIX host? Will that accomplish anything? The bottom line is, I don't want to make things worse. I want to know what I am doing and why, and provide the best configuration possible to the UNIX admin.
Kurt
I am responsible for our company's LAN and Clariion SAN environments. My primary responsibilities have always been on the Windows server side for disk on the SAN. I no nothing about UNIX. I think it might be a rock group.?
I am now being asked to provide a new disk/LUN on our Clariion, which houses all UNIX host data as well. The disk is going to provide adequate sizing for what I am told is the UNIX "swap space". I have no idea what this "swap space" acts like or does, and I would appreciate an explanation so that I can create an appropriate LUN.
On the Clariion, my options include choosing a separate bus, enclosure and physical disk drives which I might do anyway, but should I choose RAID 1 or RAID5?
In addition, what about providing this "swap space" LUN on a completely separate fiber channel adapter in the UNIX host? Will that accomplish anything? The bottom line is, I don't want to make things worse. I want to know what I am doing and why, and provide the best configuration possible to the UNIX admin.
Kurt
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LEARN ABOUT SUNOS
dpt
dpt(7D) Devices dpt(7D) NAME
dpt - DPT ServeRAID IV SCSI host bus adapter and RAID adapter driver DESCRIPTION
The dpt driver is a driver for the DPT (Distributed Processing Technology) family of SmartRAID IV SCSI HBA and RAID adapters. The following HBA adapters are supported: PM2024, PM2044UW, PM2044W, PM2124, PM2124W, PM2144UW, and PM2144W. The following RAID adapters are supported: PM3224, PM3224W, PM3334UW, and PM3334W. PRECONFIGURATION
o DPT PM3224 only: Only EPROM 7A and later versions are supported. o DPT PM2024 and PM2124 only: Only EPROM 6D4 and later versions are supported. o Use adapters with SmartROM version 3.B or later versions only. o Be sure that the controller board is installed in a PCI bus-mastering slot. o Disable PCI parity checking if your firmware version is earlier than version 7A, if your system memory is ECC, or if your system does not check parity. Known Problems and Limitations During system boot, a message may be displayed saying a DPT controller driver cannot be installed. This message indicates that the mother- board installed in your system may contain ECC memory or may not check parity. If you see this message is displayed, disable PCI parity checking. Supported Settings o I/O Address: Auto CONFIGURATION
Auto-configuration code determines whether the adapter is present at the configured address and what types of devices are attached to it. The DPT 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 you boot 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/dpt.conf dpt 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 descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Architecture |x86 | +-----------------------------+-----------------------------+ SEE ALSO
fdisk(1M), attributes(5), cmdk(7D) SunOS 5.10 27 November 2000 dpt(7D)