Maria,
Here is the Scan Output from Master Server , I see the serial numbers were also missing from few drives.
zsswmasb1:~ # scan
************************************************************
*********************** SDT_TAPE ************************
*********************** SDT_CHANGER ************************
*********************** SDT_OPTICAL ************************
************************************************************
------------------------------------------------------------
Device Name : "/dev/sg2"
Passthru Name: "/dev/sg2"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM 03584L32 7270"
Vendor ID : "IBM "
Product ID : "03584L32 "
Product Rev: "7270"
Serial Number: "0000000220610401"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM 03584L32 0000000220610401"
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-3
Number of Drives : 15
Number of Slots : 695
Number of Media Access Ports: 16
Drive 1 Serial Number : "1092K21F"
Drive 2 Serial Number : "0007854339"
Drive 3 Serial Number : "0007868627"
Drive 4 Serial Number : "0007854570"
Drive 5 Serial Number : "1097724Z"
Drive 6 Serial Number : "0007872462"
Drive 7 Serial Number : ""
Drive 8 Serial Number : ""
Drive 9 Serial Number : ""
Drive 10 Serial Number : ""
Drive 11 Serial Number : ""
Drive 12 Serial Number : ""
Drive 13 Serial Number : "1008223M"
Drive 14 Serial Number : "1310230601"
Drive 15 Serial Number : "0007850518"
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst0"
Passthru Name: "/dev/sg1"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 B710"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "B710"
Serial Number: "1092K21F"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 1092K21F "
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/sg10"
Passthru Name: "/dev/sg10"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM 03584L32 7270"
Vendor ID : "IBM "
Product ID : "03584L32 "
Product Rev: "7270"
Serial Number: "0000000220610401"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM 03584L32 0000000220610401"
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-3
Number of Drives : 15
Number of Slots : 695
Number of Media Access Ports: 16
Drive 1 Serial Number : "1092K21F"
Drive 2 Serial Number : "0007854339"
Drive 3 Serial Number : "0007868627"
Drive 4 Serial Number : "0007854570"
Drive 5 Serial Number : "1097724Z"
Drive 6 Serial Number : "0007872462"
Drive 7 Serial Number : ""
Drive 8 Serial Number : ""
Drive 9 Serial Number : ""
Drive 10 Serial Number : ""
Drive 11 Serial Number : ""
Drive 12 Serial Number : ""
Drive 13 Serial Number : "1008223M"
Drive 14 Serial Number : "1310230601"
Drive 15 Serial Number : "0007850518"
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst8"
Passthru Name: "/dev/sg11"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 7BG2"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "7BG2"
Serial Number: "0007851931"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007851931"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst9"
Passthru Name: "/dev/sg12"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 7BG2"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "7BG2"
Serial Number: "0007851619"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007851619"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/sg13"
Passthru Name: "/dev/sg13"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM 03584L32 7270"
Vendor ID : "IBM "
Product ID : "03584L32 "
Product Rev: "7270"
Serial Number: "0000000221020401"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM 03584L32 0000000221020401"
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-3
Number of Drives : 15
Number of Slots : 695
Number of Media Access Ports: 16
Drive 1 Serial Number : "0007851619"
Drive 2 Serial Number : "0007851931"
Drive 3 Serial Number : "0007852086"
Drive 4 Serial Number : "0007854667"
Drive 5 Serial Number : "0007872572"
Drive 6 Serial Number : "0007898555"
Drive 7 Serial Number : ""
Drive 8 Serial Number : ""
Drive 9 Serial Number : ""
Drive 10 Serial Number : ""
Drive 11 Serial Number : ""
Drive 12 Serial Number : ""
Drive 13 Serial Number : "1310085324"
Drive 14 Serial Number : "0007852139"
Drive 15 Serial Number : "0007852091"
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst10"
Passthru Name: "/dev/sg14"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 7BG2"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "7BG2"
Serial Number: "0007852086"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007852086"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst11"
Passthru Name: "/dev/sg15"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 7BG2"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "7BG2"
Serial Number: "0007854667"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007854667"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst1"
Passthru Name: "/dev/sg3"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 B710"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "B710"
Serial Number: "0007872462"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007872462"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst2"
Passthru Name: "/dev/sg4"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 C7QH"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "C7QH"
Serial Number: "1097724Z"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 1097724Z "
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst3"
Passthru Name: "/dev/sg5"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 C7QH"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "C7QH"
Serial Number: "0007868627"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007868627"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst4"
Passthru Name: "/dev/sg6"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 C7QH"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "C7QH"
Serial Number: "1008223M"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 1008223M "
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst5"
Passthru Name: "/dev/sg7"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 B710"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "B710"
Serial Number: "0007854570"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007854570"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst6"
Passthru Name: "/dev/sg8"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 B710"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "B710"
Serial Number: "1310230601"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 1310230601"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst7"
Passthru Name: "/dev/sg9"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 B710"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "B710"
Serial Number: "0007854339"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007854339"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst12"
Passthru Name: "/dev/sg16"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 7BG2"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "7BG2"
Serial Number: "0007872572"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007872572"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0