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57 lines
2.5 KiB
57 lines
2.5 KiB
From 13f9e172d4a3576efa1ddacaca26286266866d2d Mon Sep 17 00:00:00 2001 |
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From: Joerg Steffens <joerg.steffens@bareos.com> |
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Date: Tue, 21 Nov 2017 12:21:49 +0100 |
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Subject: [PATCH] udev-rules: make tape-changers also apprear in |
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/dev/tape/by-path/ |
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It is important to be able to access tape changer ("Medium Changers") by |
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persistant name. |
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While tape devices can be accessed via /dev/tape/by-id/ and |
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/dev/tape/by-path/, tape-changers could only be accessed by |
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/dev/tape/by-id/. |
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However, in some cases, especially when accessing Amazon Webservice |
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Storage Gateway VTLs (or accessing iSCSI VTLs in general?) this does not |
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work, as all tape devices and the tape changer have the same ENV{ID_SERIAL}. |
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The results is, that only the last device is available in |
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/dev/tape/by-id/, as the former devices have been overwritten. |
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As this behavior is hard to change without breaking consistentcy, |
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this additional device in /dev/tape/by-path/ can be used to access the medium changes. |
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The tape devices can also be accessed by this path. |
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The content of the directory will now look like: |
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# SCSI tape device, rewind (unchanged) |
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/dev/tape/by-path/$env{ID_PATH} -> ../../st* |
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# SCSI tape device, no-rewind (unchanged) |
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/dev/tape/by-path/$env{ID_PATH}-nst -> ../../nst* |
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# SCSI tape changer device (newly added) |
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/dev/tape/by-path/$env{ID_PATH}-changer -> ../../sg* |
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Tape devices and tape changer have different ID_PATHs. |
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SCSI tape changer get the suffix "-changer" |
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to make them better distinguishable from tape devices. |
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(cherry-picked from commit 7f8ddf96a25162f06bd94a684cf700c128d18142) |
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(cherry picked from commit 1b723aea42e29becd0be2fdef990401803dbfba6) |
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Resolves: #1814028 |
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--- |
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rules/60-persistent-storage-tape.rules | 3 +++ |
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1 file changed, 3 insertions(+) |
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diff --git a/rules/60-persistent-storage-tape.rules b/rules/60-persistent-storage-tape.rules |
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index f2eabd92a8..99898c147b 100644 |
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--- a/rules/60-persistent-storage-tape.rules |
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+++ b/rules/60-persistent-storage-tape.rules |
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@@ -8,6 +8,9 @@ ACTION=="remove", GOTO="persistent_storage_tape_end" |
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SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{program}="scsi_id --sg-version=3 --export --whitelisted -d $devnode", \ |
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SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL}" |
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+SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{builtin}="path_id", \ |
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+ SYMLINK+="tape/by-path/$env{ID_PATH}-changer" |
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+ |
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SUBSYSTEM!="scsi_tape", GOTO="persistent_storage_tape_end" |
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KERNEL=="st*[0-9]|nst*[0-9]", ATTRS{ieee1394_id}=="?*", ENV{ID_SERIAL}="$attr{ieee1394_id}", ENV{ID_BUS}="ieee1394"
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