Re: LSI MegaRAID not recognised correctly in 64-bit. 2.6.29.6

[James Bottomley <James.Bottomley@suse.de>]

On Wed, 2009-09-16 at 09:18 -0700, Eddie wrote:
> 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.

How much memory does your system have?

Best guess in the 64 bit case is that the physical memory the kernel is
doing DMA to isn't within the range of the card.  You might be able to
test this by booting with the max_addr=4G parameter in the 64 bit case.

If it is, we'll have to get the DMA mask for this thing set up
correctly.

James