LSI MegaRAID not recognised correctly in 64-bit. 2.6.29.6

[Eddie <stunnel@attglobal.net>]

I've done a quick search of the archives, and didn't find anything 
relevant, or I missed it.  :(

I've just installed the latest Slackware release, 13.0, in 64-bit mode, 
that uses kernel 2.6.29.6.  Previously, I was running 12.2, in 32-bit, 
which used kernel 2.6.27.31.  After booting, I noticed that the drives 
on the raid had not been mounted.  Checking through dmesg, I noticed 
that the "drive" attached to the card had not been correctly 
recognised.  Here's the relevant messages, about the card, and the 
drive, from dmesg:

megaraid cmm: 2.20.2.7 (Release Date: Sun Jul 16 00:01:03 EST 2006)

megaraid: 2.20.5.1 (Release Date: Thu Nov 16 15:32:35 EST 2006)
megaraid: probe new device 0x101e:0x1960:0x101e:0x0511: bus 1:slot 4:func 0

megaraid 0000:01:04.0: PCI INT A -> Link[LNK1] -> GSI 19 (level, high) 
-> IRQ 19
megaraid: fw version:[N661] bios version:[1.01]
scsi4 : LSI Logic MegaRAID driver
scsi[4]: scanning scsi channel 0 [Phy 0] for non-raid devices

scsi[4]: scanning scsi channel 1 [Phy 1] for non-raid devices
scsi[4]: scanning scsi channel 2 [Phy 2] for non-raid devices
scsi[4]: scanning scsi channel 3 [Phy 3] for non-raid devices
scsi[4]: scanning scsi channel 4 [virtual] for logical drives
scsi scan: INQUIRY result too short (5), using 36
scsi 4:4:0:0: Direct-Access                                    PQ: 0 ANSI: 0
sd 4:4:0:0: [sda] Sector size 0 reported, assuming 512.
sd 4:4:0:0: [sda] 1 512-byte hardware sectors: (512 B/512 B)
sd 4:4:0:0: [sda] Write Protect is off
sd 4:4:0:0: [sda] Mode Sense: 00 00 00 00
sd 4:4:0:0: [sda] Asking for cache data failed
sd 4:4:0:0: [sda] Assuming drive cache: write through
sd 4:4:0:0: [sda] Sector size 0 reported, assuming 512.
sd 4:4:0:0: [sda] 1 512-byte hardware sectors: (512 B/512 B)
sd 4:4:0:0: [sda] Write Protect is off
sd 4:4:0:0: [sda] Mode Sense: 00 00 00 00
sd 4:4:0:0: [sda] Asking for cache data failed
sd 4:4:0:0: [sda] Assuming drive cache: write through
 sda: unknown partition table
sd 4:4:0:0: [sda] Attached SCSI disk
sd 4:4:0:0: Attached scsi generic sg1 type 0


Obviously, it's this "scsi scan: INQUIRY result too short (5), using 
36", causing the drive not to be correctly recognised.  Normally, I'd 
expect to get:

scsi 4:4:0:0: Direct-Access     MegaRAID LD 0 RAID5 1430G N661 PQ: 0 ANSI: 2
sd 4:4:0:0: [sda] 2930307072 512-byte hardware sectors (1500317 MB)

In order to eliminate either the change in kernel version, or the change 
in architecture, as the culprit, I booted the machine, from both the 
32-bit, and 64-bit, DVDs from Slack.  With the 32-bit kernel, the drive 
was correctly recognised, but not with the 64-bit.  So, it's definitely 
the change in architecture causing this, not the change in kernel version.

The full dmesg can be found here:  ftp.BogoLinux.net/pub together with 
the dmesg from the 32-bit system, with kernel 2.6.27.31.

Cheers,
Eddie