Original Message:
Sent: Thu November 02, 2023 08:57 AM
From: Robert Berendt
Subject: Decommissioning 'some' of the volumes in my FS7300 allocated to IBM i.
In your example a 9223-22H is a Power 9, not a flash system. And that is the serial number of your Power 9.
In our case the disk drive location is: U9105.41B.7856551-V4-C125-T0-W500507681011A8D7-L0019000000000000
We have a Power 10 9105-41B. And 7856551 matches system value QSRLNBR.
Our flash system is a 4657-924 with a serial number of 78E3F4E
The disk drive serial number is: Y438C40000F1
I have noticed that the serial number appears 8 times for DMPxxx multipath drives. The documentation you pointed out to me says this. It says the location code should be the same but the Cxxx differs and the long Wxxx... differs
Y438C40000F1
DMP259 U9105.41B.7856551-V4-C125-T0-W500507681011A918-L0019000000000000
DMP311 U9105.41B.7856551-V4-C126-T0-W500507681012A918-L0019000000000000
DMP312 U9105.41B.7856551-V4-C126-T0-W500507681012A8D7-L0019000000000000
DMP362 U9105.41B.7856551-V4-C127-T0-W500507681012A918-L0019000000000000
DMP364 U9105.41B.7856551-V4-C127-T0-W500507681012A8D7-L0019000000000000
DMP415 U9105.41B.7856551-V4-C128-T0-W500507681011A8D7-L0019000000000000
DMP416 U9105.41B.7856551-V4-C128-T0-W500507681011A918-L0019000000000000
DMP260 U9105.41B.7856551-V4-C125-T0-W500507681011A8D7-L0019000000000000
The C125 can be seen on the HMC in Virtual Storage, Adapter View, Virtual Fibre Channel Adapters and can be used to determine which VIOS lpar ties to that. In our case C125 and C127 are one VIOS lpar and C126 and C128 go to another VIOS lpar. The HMC also shows the location which can be used to find the card slot and the port number
I am feeling more confident in taking the last two characters of the drive serial number, Y438C40000F1 and tying that to the last two columns of the Volume UID: 6005076810810548C0000000000000F1
So that helps.
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Robert Berendt IBMChampion
Original Message:
Sent: Thu November 02, 2023 06:14 AM
From: Patrik Groß
Subject: Decommissioning 'some' of the volumes in my FS7300 allocated to IBM i.
Example: Location : U9223.22H.784XXF0-V3-C32-T1-W500508680D05C9C7-L2000000000000
Serialnumber of Storage System; 784XXF0
WWPN; W500508680D05C9C7
LUN (Volume SCSI-ID): L2000000000000
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Patrik Groß
Original Message:
Sent: Thu November 02, 2023 05:46 AM
From: Patrik Groß
Subject: Decommissioning 'some' of the volumes in my FS7300 allocated to IBM i.
Hello Robert,
the necessary information is hidden in the location and serial number. You can find it in the details of the drive. The structure is relatively simple.
The location found in the details of the disk in the IBM i contains all the information such as system name, serial number of the flash system and the LUN. The serial number starts with 78 and is 7 digits long
The last three digits of the serial number correspond to the LUN.
Sources:
Best regards
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Patrik Groß
Original Message:
Sent: Wed November 01, 2023 04:12 PM
From: Robert Berendt
Subject: Decommissioning 'some' of the volumes in my FS7300 allocated to IBM i.
I did find some more information in SST. Some of the string of digits gets closer to matching the FS7300 but not enough to give me a real warm feeling you know?
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Robert Berendt IBMChampion
Original Message:
Sent: Wed November 01, 2023 03:57 PM
From: Robert Berendt
Subject: Decommissioning 'some' of the volumes in my FS7300 allocated to IBM i.
We significantly reduced the amount of disk space needed on one lpar of IBM i. We have two hosts on the 7300 with 26 mapped volumes each for a total of 52 volumes. This matches what I see on IBM i with WRKDSKSTS. I know how to use STRSST on IBM i to see the disks. I know how to deprovision the drives on the IBM i. https://www.ibm.com/support/pages/moving-data-dasd-removing-asp
I'm a real newbie with SAN stuff.
But does it make sense to try to balance the drives I remove between the two hosts? Like I want to remove 17 volumes so should I remove 9 from one and 8 from the other?
How do I ensure that after I removed the drives from IBM i that I remove the right volumes on the FS7300?
On IBM i each drive has something like
This should match this unit on the FS7300 but I can't see how to confirm that.
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Robert Berendt IBMChampion
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