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---- Dear Listers, We have experienced this for the second time & wondering if perhaps we are doing something wrong here. Surely you don't need to reboot VM just to add dasd to a VM guest (Linux - SLES10 SP1). Firstly, we are running VM v5.3. In SYSTEM CONFIG we have specified the following just to prevent reIPLing VM just to add dasd: User_Volume_Include LNX* These are the steps I've followed : q a40e DASD A40E SAA40E I then initialised the volume as LNX015 using cpfmtxa & thereafter detached it. q a40e DASD A40E LNX015 I then defined the MDISK under user SLES10X in USER DIRECT: MDISK 120 3390 0001 3338 LNX015 MR LNX4VM LNX4VM LNX4VM directxa user z/VM USER DIRECTORY CREATION PROGRAM - VERSION 5 RELEASE 3.0 EOJ DIRECTORY UPDATED AND ON LINE HCPDIR494I User directory occupies 45 disk pages cp q MDISK USER SLES10X 0120 DIRECT LOCATION HCPQMD040E Device 0120 does not exist Issuing the following command in linux01 or SLES10X VM guest does not reflect the added minidisk. linux01:~ #lsdasd : 0.0.0118(ECKD) at ( 94: 96) is dasdy : active at blocksize 4096, 54000 blocks, 210 MB 0.0.0119(ECKD) at ( 94:100) is dasdz : active at blocksize 4096, 1802880 blocks, 7042 MB CP Q V DASD DASD 0100 3390 LNX002 R/W 3038 CYL ON DASD A14D SUBCHANNEL = 0000 DASD 0102 3390 LNX002 R/W 300 CYL ON DASD A14D SUBCHANNEL = 0001 DASD 0103 3390 LNX003 R/W 3333 CYL ON DASD A140 SUBCHANNEL = 0002 : DASD 0118 3390 LNX011 R/W 300 CYL ON DASD A404 SUBCHANNEL = 0011 DASD 0119 3390 LNX014 R/W 10016 CYL ON DASD 7F0A SUBCHANNEL = 0012 DASD 0190 3390 530RES R/O 107 CYL ON DASD 703B SUBCHANNEL = 001A linux01:~ # lscss -t 3390 Device Subchan. DevType CU Type Use PIM PAM POM CHPIDs ---------------------------------------------------------------------- 0.0.0100 0.0.0000 3390/0A 3990/E9 yes F0 F0 FF 60616869 00000000 0.0.0102 0.0.0001 3390/0A 3990/E9 yes F0 F0 FF 60616869 00000000 : 0.0.0119 0.0.0012 3390/0C 3990/E9 yes F0 F0 FF 62636A6B 00000000 0.0.0190 0.0.001A 3390/0C 3990/E9 F0 F0 FF 62636A6B 00000000 LOGON SLES10X HCPLNM108E SLES10X 0120 not linked; volid LNX015 not mounted I'm sure we are overlooking something here. Does anyone know what we missing here to prevent an IPL of VM just to add dasd. Your assistance is very much appreciated... Kind regards, Vikesh Bhoola