How to remove scsi san disk?

[Ryan Golhar]

How do I determine the device mapping of a SCSI drive to the SCSI host, 
bus, lun?  And  How to I remove the mapping to delete the SCSI drive?

I have a fibre-connected SAN.  I've created a few drives on the SAN and 
mapped it to my linux host.  The linux host sees the drives just fine. 
I remove the drives from linux, and left them as uninitialize disks. 
Whenever I run "fdisk -l", I get output:

[root at cicweb1 tmp]# /sbin/fdisk -l

Disk /dev/sda: 440.0 GB, 440076861440 bytes
255 heads, 63 sectors/track, 53502 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14       53502   429650392+  8e  Linux LVM


I also get in /var/log/messages that drives that I since removed from 
the SAN.  How to I remove these (/dev/sdb and /dev/sdc) in linux?

Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 0
Apr 17 13:02:40 cicweb1 kernel: printk: 48 messages suppressed.
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 0
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 0
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 8
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 1
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 2
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 3
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 0
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 
1169776632
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 146222079
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 
1169776632
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 146222079
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 0
Apr 17 13:02:40 cicweb1 kernel: Buffer I/O error on device sdb, logical 
block 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 8
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdb, sector 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 0
Apr 17 13:02:40 cicweb1 last message repeated 2 times
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 8
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 
1169776632
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 
1169776632
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 0
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 8
Apr 17 13:02:40 cicweb1 kernel: end_request: I/O error, dev sdc, sector 0