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Re: Qlogic 1040B

On Tuesday 11 February 2003 05:03 am, Jan Lentfer wrote:
> Hi all,
> I bougth a Qlogic 1040B SCSI controller to replace the Adaptec
> controller in my PWS 500a, thus actualling switching it to an
> 500au.
> The problem I have is:
> The controller is found by SRM (show dev) (hooray!!!)
> I build the "qlogicisp" kernel module and the controller is
> reported as: scsi0 : QLogic ISP1020 SCSI on PCI bus 01 device
> 50 irq 44 I/O base 0x8800
> But my harddisks are not found. When I attach them back to the
> Adaptec, this is what I get:
> 6.2.8 <Adaptec 2940 Ultra SCSI adapter>
>         aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
> blk: queue fffffc00001f3cb0, no I/O memory limit
>   Vendor: COMPAQ    Model: ST15150W          Rev: 6216
>   Type:   Direct-Access                      ANSI SCSI
> revision: 02 blk: queue fffffc001b7a00d0, no I/O memory limit
>   Vendor: SEAGATE   Model: ST19171W          Rev: 0023
>   Type:   Direct-Access                      ANSI SCSI
> revision: 02 blk: queue fffffc001b7a02d0, no I/O memory limit
> scsi1:A:0:0: Tagged Queuing enabled.  Depth 253
> scsi1:A:8:0: Tagged Queuing enabled.  Depth 253
> Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
> Attached scsi disk sdb at scsi1, channel 0, id 8, lun 0
> (scsi1:A:0): 10.000MB/s transfers (10.000MHz, offset 8)
> sda: Spinning up disk...............ready
> SCSI device sda: 8386000 512-byte hdwr sectors (4294 MB)
>  sda: sda1 sda2
> (scsi1:A:8): 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> SCSI device sdb: 17783112 512-byte hdwr sectors (9105 MB)
>  sdb: sdb1 sdb2
> Any suggestions???? Why are my harddisks not found by the
> QLogic adapter?

IIRC, the 1040B is a high-voltage differential (HVD) adapter.  
SCSI is most commonly either single-ended (SCSI-1, SCSI-2, Ultra 
SCSI) or low-voltage differential (Ultra2 or greater).  HVD was 
a stop-gap standard between SE and LVD, and it's electrically 
compatible with neither one.  HVD controllers only work with HVD 
drives, and vice versa. :(

Just to confirm this, you can either look for a "SCSI DIFF" label 
next to the card's external SCSI port, or look for an array of 
eight yellow resistor packs--next to the external SCSI 
port--running parallel to the internal SCSI connectors.  Either 
one means you've got an HVD card.

"If a server crashes in a server farm and no one pings it, does 
it still cost four figures to fix?"

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