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Old 07-11-2003, 04:48 AM   #1
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Question Working with array of multi-lun

I am now trying to attach a disk array to Redhat Linux Advanced Server 2.1 (IA 64 bits), and the SCSI Adapter Card is LSI 53C1030 (FwRev: 01000e00h). The array has 2 host channels. I got 2 Logical Drives (RAID 1) installed in the array and mapped them respectively to LUN0 and LUN1 of the host Channel that was linked to the host. I knew from the screen that LSI had recognized the array, the 2 LDs and the capacities of them. However, there was ONLY sda, which is the LD mapped to the LUN0. It seems that Linux can't recognize LDs mapped to LUN1, LUN2, and over. I've tried the same thing on MS Win2k: no problem. Anyone any idea? Much thanx!! I am a newcomer here, and I believe this great forum is terminal of my questions.

Last edited by troyzeng; 07-11-2003 at 04:50 AM.
Old 07-11-2003, 10:05 AM   #2
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assume you have kernel tweaked to support multiple luns? (is set to 'no' in many stock distro kernels)
Old 07-13-2003, 08:45 PM   #3
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Thanks, Larry.
Are you familiar with Redhat Linux Advanced Server 2.1? On Solaris, just set a parameter in a certain file to 'yes' to support multiple luns. But I don't know if it is the same case with Linux and where the parameter is.
Old 07-14-2003, 08:40 AM   #4
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This is going to take a kernel recompile. Get the kernel source, and run 'make xconfig' and look in the scsi section for multiple-lun option.

Old 11-15-2003, 04:48 AM   #5
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U have to add

append "max_scsi_luns=128" and rebuild the initrd. It will detect all the LUNs.



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