[9225] in linux-scsi channel archive
Re: more than 16 scsi disks
daemon@ATHENA.MIT.EDU (quintus@us.ibm.com)
Thu Jul 20 11:28:34 2000
From: quintus@us.ibm.com
To: vasuvarma@lycos.com
cc: linux-scsi@vger.rutgers.edu
Message-ID: <87256922.0054C22D.00@d53mta08h.boulder.ibm.com>
Date: Thu, 20 Jul 2000 09:25:45 -0600
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Vasu,
You might want to look carefully at the major and minor numbers you
assigned by doing an "ls -l |grep sd | more" for example in /dev. I made
some addition errors the first time. You have to match up every 16 luns
for each new partition. An example of what I have is below. If you don't
need all 16 luns, you don't have to make the nodes, but you do have to get
the math right. I myself forgot how to add after calculus :-) I can't
say for sure for your distro, but you shouldn't have to change anything in
the kernel.
---begin snip from /dev-----------------------------------------
brw-rw---- 1 root disk 8, 250 Apr 16 1999 sdp10
brw-rw---- 1 root disk 8, 251 Apr 16 1999 sdp11
brw-rw---- 1 root disk 8, 252 Apr 16 1999 sdp12
brw-rw---- 1 root disk 8, 253 Apr 16 1999 sdp13
brw-rw---- 1 root disk 8, 254 Apr 16 1999 sdp14
brw-rw---- 1 root disk 8, 255 Apr 16 1999 sdp15
brw-rw---- 1 root disk 8, 242 Apr 16 1999 sdp2
brw-rw---- 1 root disk 8, 243 Apr 16 1999 sdp3
brw-rw---- 1 root disk 8, 244 Apr 16 1999 sdp4
brw-rw---- 1 root disk 8, 245 Apr 16 1999 sdp5
brw-rw---- 1 root disk 8, 246 Apr 16 1999 sdp6
brw-rw---- 1 root disk 8, 247 Apr 16 1999 sdp7
brw-rw---- 1 root disk 8, 248 Apr 16 1999 sdp8
brw-rw---- 1 root disk 8, 249 Apr 16 1999 sdp9
brw-rw-r-- 1 root root 65, 0 May 6 07:28 sdq
brw-rw-r-- 1 root root 65, 1 May 6 07:28 sdq1
brw-rw-r-- 1 root root 65, 16 May 6 07:28 sdr
brw-rw-r-- 1 root root 65, 17 May 6 07:28 sdr1
brw-rw-r-- 1 root root 65, 32 May 6 07:28 sds
brw-rw-r-- 1 root root 65, 33 May 6 07:28 sds1
brw-rw-r-- 1 root root 65, 48 May 6 07:28 sdt
brw-rw-r-- 1 root root 65, 49 May 6 07:28 sdt1
brw-rw-r-- 1 root root 65, 64 May 6 07:28 sdu
brw-rw-r-- 1 root root 65, 65 May 6 07:28 sdu1
brw-rw-r-- 1 root root 65, 80 May 6 07:28 sdv
brw-rw-r-- 1 root root 65, 81 May 6 07:28 sdv1
brw-rw-r-- 1 root root 65, 96 May 6 07:28 sdw
brw-rw-r-- 1 root root 65, 97 May 6 07:28 sdw1
brw-rw-r-- 1 root root 65, 112 May 6 07:28 sdx
brw-rw-r-- 1 root root 65, 113 May 6 07:28 sdx1
---end snip from /dev-------------------------------------------
Sincerely,
Quintus Schulzke HERE LIES LESTER MOORE
Test Engineer, Disk Adapter Test SHOT 4 TIMES WITH A .44
IBM Tucson NO LES
(520) 799-5798, 8-321-5798 NO MOORE --tombstone in Tombstone, AZ
>fdisk fails even after making the /dev entries.
>should anything be tuned/set in kernel?
>thanx,
>vasu
>--
>On Tue, 18 Jul 2000 09:03:27
>quintus wrote:
>>
>>
>>You can use MAKEDEV sd** for up to sdz (see man pages)in /dev. After
that
>>for sdaa and above you'll need to make the nodes with "mknod" and track
>>your major and minor numbers:
>>i.e.
>>mknod sdaa b 8 222
>>mknod sdaa1 b 8 223
>>
>>Sincerely,
>>
>>
>>Quintus Schulzke HERE LIES LESTER MOORE
>>Test Engineer, Disk Adapter Test SHOT 4 TIMES WITH A .44
>>IBM Tucson NO LES
>>(520) 799-5798, 8-321-5798 NO MOORE --tombstone in Tombstone, AZ
>>
>>>When I try to load driver with more than 16 scsi disks, >the system does
>>not map more than 16. Is there any thing >to be changed ? host->max_id is
>>set to 32.
>>>
>>>thanx in advance,
>>>vasu.
>>
>>
>>
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