Which command updates /dev/mapper entries after partition deletion?

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When a new partition is created, the "dmraid -ay" command can be used to create the missing entry in /dev/mapper. The opposite situation does not appear to work wherein I delete a partition.

Which command should be used to remove and/or update the /dev/mapper entries when a partition is deleted?

Attached is a log of my session where I used parted to delete a partition, and then tried to delete all the /dev/mapper entries with "dmraid -an".

Regards,
Curtis Gedak
Maintainer of GParted

*****
***** Print dmraid version information
*****

gedakc@quad:/dev/mapper$ sudo dmraid --version
dmraid version:		1.0.0.rc14 (2006.11.08) 
dmraid library version:	1.0.0.rc14 (2006.11.08)
device-mapper version:	4.12.0
gedakc@quad:/dev/mapper$ 


*****
***** Original listing of /dev/mapper directory after bootup.
*****

gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     140 2009-02-28 09:04 ./
drwxr-xr-x 13 root root   14520 2009-02-28 09:05 ../
crw-rw----  1 root root  10, 63 2009-02-28 09:04 control
brw-rw----  1 root disk 254,  0 2009-02-28 09:04 isw_cjdcbiheed_TestRaid
brw-rw----  1 root disk 254,  1 2009-02-28 09:04 isw_cjdcbiheed_TestRaid1
brw-rw----  1 root disk 254,  2 2009-02-28 09:04 isw_cjdcbiheed_TestRaid5
brw-rw----  1 root disk 254,  3 2009-02-28 09:04 isw_cjdcbiheed_TestRaid6


*****
***** Delete partition number 5 using parted
***** NOTE:  The error messages are related to parted failing to inform
*****        the kernel of the partition layout change.  I believe this
*****        is because /dev/mapper devices do not use a kernel ioctl call
*****        to reread the partition table
***** 

gedakc@quad:/dev/mapper$ sudo parted /dev/mapper/isw_cjdcbiheed_TestRaid
GNU Parted 1.8.8.1.115-d53a
Using /dev/mapper/isw_cjdcbiheed_TestRaid
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) unit s                                                           
unit s
(parted) print                                                            
print
Model: Unknown (unknown)
Disk /dev/mapper/isw_cjdcbiheed_TestRaid: 312494080s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start       End         Size        Type      File system  Flags
 1      63s         224909s     224847s     primary   ext2              
 2      224910s     312480314s  312255405s  extended                    
 6      15872283s   43889579s   28017297s   logical   reiserfs          
 5      307741203s  312480314s  4739112s    logical   ntfs              

(parted) rm 5                                                             
rm 5
Error: Error informing the kernel about modifications to partition        
/dev/mapper/isw_cjdcbiheed_TestRaid1 -- Invalid argument.  This means Linux
won't know about any changes you made to /dev/mapper/isw_cjdcbiheed_TestRaid1
until you reboot -- so you shouldn't mount it or use it in any way before
rebooting.
Ignore/Cancel? ignore                                                     
ignore
Error: Error informing the kernel about modifications to partition        
/dev/mapper/isw_cjdcbiheed_TestRaid2 -- Invalid argument.  This means Linux
won't know about any changes you made to /dev/mapper/isw_cjdcbiheed_TestRaid2
until you reboot -- so you shouldn't mount it or use it in any way before
rebooting.
Ignore/Cancel? Ignore                                                     
Ignore
Error: Error informing the kernel about modifications to partition        
/dev/mapper/isw_cjdcbiheed_TestRaid5 -- Invalid argument.  This means Linux
won't know about any changes you made to /dev/mapper/isw_cjdcbiheed_TestRaid5
until you reboot -- so you shouldn't mount it or use it in any way before
rebooting.
Ignore/Cancel? Ignore                                                     
Ignore
(parted) print                                                            
print
Model: Unknown (unknown)
Disk /dev/mapper/isw_cjdcbiheed_TestRaid: 312494080s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start      End         Size        Type      File system  Flags
 1      63s        224909s     224847s     primary   ext2              
 2      224910s    312480314s  312255405s  extended                    
 5      15872283s  43889579s   28017297s   logical   reiserfs          

(parted) quit                                                             
quit
Information: You may need to update /etc/fstab.                           


*****
***** List the /dev/mapper entries again.
***** NOTE:  No dmraid commands have been executed
*****

gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     140 2009-02-28 09:04 ./
drwxr-xr-x 13 root root   14520 2009-02-28 09:05 ../
crw-rw----  1 root root  10, 63 2009-02-28 09:04 control
brw-rw----  1 root disk 254,  0 2009-02-28 10:28 isw_cjdcbiheed_TestRaid
brw-rw----  1 root disk 254,  1 2009-02-28 09:04 isw_cjdcbiheed_TestRaid1
brw-rw----  1 root disk 254,  2 2009-02-28 09:04 isw_cjdcbiheed_TestRaid5
brw-rw----  1 root disk 254,  3 2009-02-28 09:04 isw_cjdcbiheed_TestRaid6


*****
***** Try to remove the /dev/mapper entires using dmraid command
*****

gedakc@quad:/dev/mapper$ sudo dmraid -an


*****
***** NOTE:  Two entries remain.  My guess is that the
*****        isw_cjdcbiheed_TestRaid6 exists because it was in a logical
*****        partition of an MSDOS partition table.
*****        

gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     100 2009-02-28 10:29 ./
drwxr-xr-x 13 root root   14520 2009-02-28 09:05 ../
crw-rw----  1 root root  10, 63 2009-02-28 09:04 control
brw-rw----  1 root disk 254,  0 2009-02-28 10:28 isw_cjdcbiheed_TestRaid
brw-rw----  1 root disk 254,  3 2009-02-28 09:04 isw_cjdcbiheed_TestRaid6


*****
***** Try to recreate the /dev/mapper entries
*****

gedakc@quad:/dev/mapper$ sudo dmraid -ay
RAID set "isw_cjdcbiheed_TestRaid" already active


*****
***** Directory listing again
*****

gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     140 2009-02-28 10:29 ./
drwxr-xr-x 13 root root   14520 2009-02-28 10:29 ../
crw-rw----  1 root root  10, 63 2009-02-28 09:04 control
brw-rw----  1 root disk 254,  0 2009-02-28 10:28 isw_cjdcbiheed_TestRaid
brw-rw----  1 root disk 254,  1 2009-02-28 10:29 isw_cjdcbiheed_TestRaid1
brw-rw----  1 root disk 254,  2 2009-02-28 10:29 isw_cjdcbiheed_TestRaid5
brw-rw----  1 root disk 254,  3 2009-02-28 09:04 isw_cjdcbiheed_TestRaid6


*****
***** NOTE:
***** If I remove all /dev/mapper entries (excluding control of course :-),
***** then I can use "dmraid -ay" to create the proper /dev/mapper entries.
*****

gedakc@quad:/dev/mapper$ sudo dmraid -an
gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     100 2009-02-28 10:49 ./
drwxr-xr-x 13 root root   14520 2009-02-28 10:29 ../
crw-rw----  1 root root  10, 63 2009-02-28 09:04 control
brw-rw----  1 root disk 254,  0 2009-02-28 10:28 isw_cjdcbiheed_TestRaid
brw-rw----  1 root disk 254,  3 2009-02-28 09:04 isw_cjdcbiheed_TestRaid6
gedakc@quad:/dev/mapper$ sudo dmsetup remove /dev/mapper/isw_cjdcbiheed_TestRaid6
gedakc@quad:/dev/mapper$ sudo dmraid -an
RAID set "isw_cjdcbiheed_TestRaid1" is not active
RAID set "isw_cjdcbiheed_TestRaid5" is not active
gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     60 2009-02-28 10:49 ./
drwxr-xr-x 13 root root  14520 2009-02-28 10:29 ../
crw-rw----  1 root root 10, 63 2009-02-28 09:04 control
gedakc@quad:/dev/mapper$ sudo dmraid -ay
gedakc@quad:/dev/mapper$ ll
total 0
drwxr-xr-x  2 root root     120 2009-02-28 10:49 ./
drwxr-xr-x 13 root root   14520 2009-02-28 10:49 ../
crw-rw----  1 root root  10, 63 2009-02-28 09:04 control
brw-rw----  1 root disk 254,  0 2009-02-28 10:49 isw_cjdcbiheed_TestRaid
brw-rw----  1 root disk 254,  1 2009-02-28 10:49 isw_cjdcbiheed_TestRaid1
brw-rw----  1 root disk 254,  2 2009-02-28 10:49 isw_cjdcbiheed_TestRaid5
gedakc@quad:/dev/mapper$ 

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