CentOS - Mar 2010 - Disable specific LUN on a SCSI bus

Hi all,
do you know if there is a way at boot time do disable specific LUN's on a
SCSI
bus of a particular controller?
I'm trying to write an udev rule, but it seems that the system ignores the
"vendor" model/name of the controller...

For example: I want to disable /dev/sdb; so I gather some information with
udevinfo -a -p /sys/block/sdb and I try to use them to write

/etc/udev/rules.d/10-custom.rules

ID=="?:0:1:0", BUS=="scsi", DRIVER=="sd",
SYSFS{model}=="DDYS-T36950N    ",
SYSFS{vendor}=="IBM     ", OPTIONS="ignore_device",
OPTIONS+="last_rule"


I put the "?" on the ID field because I know that the order of the
controller
can change (a kernel update could trigger the switch); also I tried with and
without the spaces at the end of vendor and model: no change

Where am I wrong? It is a different way of doing this?

TIA
Ciao
Lorenzo

Lorenzo Quatrini wrote:
> Hi all,
> do you know if there is a way at boot time do disable specific LUN's on
a
> SCSI
> bus of a particular controller?
What do you need to do this for?

How about just echoing the command to /proc/scsi/scsi

echo "scsi remove-single-device X X X X" >/proc/scsi/scsi

get the values for the various X's from /proc/scsi/scsi e.g.
Host: scsi0 Channel: 01 Id: 00 Lun: 00
  Vendor: MegaRAID Model: LD 0 RAID1   69G Rev: 521S
  Type:   Direct-Access                    ANSI SCSI revision: 02

would be 0 1 0 0

nate