Tomasz,
The LTO SCSI Reference (IBM® TotalStorage® LTO Ultrium Tape Drive SCSI Reference (LTO-5 through LTO-9)) provides a method to read the values of the MAC address(es) (see 6.6.21.3.2 MP 30h[01h]: Drive MAC address - Device attribute settings) which, in part, states "The drive MAC address is read only and is defined in table 353".
These values are stored into non-volatile memory during manufacturing. If they were somehow overwritten, which should not be possible by a user or a library, then any history of what they were is no longer in the drive.
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Kevin Butt
IBM, Tape Development Ecosystem
Tape SCSI Architect, T10 Representative
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Original Message:
Sent: Thu April 27, 2023 04:04 PM
From: Tomasz Bigaj
Subject: LTO 7 drives with the same MAC addresses
Kevin, I'm rather looking for someone who knows how to restore the original drive MAC addresses. It must be possible since the library was able to replace them.
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Tomasz Bigaj
Original Message:
Sent: Thu April 27, 2023 12:54 PM
From: Kevin Butt
Subject: LTO 7 drives with the same MAC addresses
@Tomasz Bigaj This appears to be an issue with the drive MAC addresses. This needs to be resolved by working with your library vendor.
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Kevin Butt
IBM, Tape Development Ecosystem
Tape SCSI Architect, T10 Representative
Original Message:
Sent: Thu April 27, 2023 09:47 AM
From: Tomasz Bigaj
Subject: LTO 7 drives with the same MAC addresses
Hi, it is not host connectivity. It is management connectivity. Library uses drives's ethernet port to manage it. For some reason six drives reports the same MAC.
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Tomasz Bigaj
Original Message:
Sent: Mon April 24, 2023 01:07 PM
From: Kevin Butt
Subject: LTO 7 drives with the same MAC addresses
@Tomasz Bigaj I think there needs to be qualification of the port in your question. As @Lee Jesionowski stated there is no host connectivity to LTO drives through an Ethernet port. However, the drive does connect to a library via Ethernet using the internal Ethernet port. As Lee stated, this is an issue that needs to be addressed through your vendor.
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Kevin Butt
IBM, Tape Development Ecosystem
Tape SCSI Architect, T10 Representative
Original Message:
Sent: Thu April 20, 2023 10:45 AM
From: Tomasz Bigaj
Subject: LTO 7 drives with the same MAC addresses
Hello, I have 6 IBM LTO 7 drives in quantum I6000 library. For some reason four drives have the same MAC address. Its not the problem with library - drives removet from it and connected directly (without sleds) to the network report the same, duplicated mac address 00:21:5e:d2:b9:6e.
How is it possible to have the same addreses? Is there any chance to correct it, restoring to defaults?
Drives work fine, but library can't communicate over Ethernet port and has problems with manage them.
Regards
Tomasz
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Tomasz Bigaj
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