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LUN?

O

optoman

Diamond Member
What does it stand for and what should it be set at? I have a adaptec 2940u2w and was wondering what to set the lun at. TIA
 
Logical Unit Number. Set it to any number that has not been set on another SCSI peripheral.
 
I don't understand. I have the option of setting the bios multiple LUN support in the scsi bios, should I do this? Then I can change the lun of each of the drives to either 0 or 1? I have 2 hard drives and a dvd, cd, and cdr players on the board. The 2 HDs are on the 68 pin cable and the other drives are on the 50 pin cable.
 
LUN is the logical unit number.

SCSI ID should be unique for each device. The controller should be 7 and the rest starting at 0 and going up to 7. Some SCSI types can go up to device ID 15, so the SCSI card is still 7 (for legacy support).

LUN is for say a CDROM changer that has 4 slots in it. LUN0 is the first disc, 1,2,3 are the other three.

Basically LUN's are for devices that have multiple parts. Such as a true RAID controller that plugs into a regular controller. The RAID controller has a single ID that appears to the system, but each drive in the array is assigned a LUN to address it specifically. If youre using a standard hard drive or CD drive, the LUN is always 0 since it is a single device.
 
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