[PATCH proxmox-backup] fix #5971: tape: don't warn on custom MAM attribute write failures

[Dominik Csapak <d.csapak@proxmox.com>]

We don't actually use the MAM attributes for anything substantial, it's
just informational. This makes these warnings too noisy for drives that
don't support them, so reduce them to info level.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 pbs-tape/src/sg_tape.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pbs-tape/src/sg_tape.rs b/pbs-tape/src/sg_tape.rs
index 04914e077..3e6aac685 100644
--- a/pbs-tape/src/sg_tape.rs
+++ b/pbs-tape/src/sg_tape.rs
@@ -1192,7 +1192,7 @@ impl SgTape {
 
         for (id, data) in attribute_list {
             if let Err(err) = write_mam_attribute(&mut self.file, id, data) {
-                log::warn!("could not set MAM Attribute {id:x}: {err}");
+                log::info!("could not set MAM Attribute {id:x}: {err}");
             }
         }
     }
@@ -1201,7 +1201,7 @@ impl SgTape {
     fn clear_mam_attributes(&mut self) {
         for attr in [0x08_00, 0x08_01, 0x08_02, 0x08_03, 0x08_08] {
             if let Err(err) = write_mam_attribute(&mut self.file, attr, b"") {
-                log::warn!("could not clear MAM attribute {attr:x}: {err}");
+                log::info!("could not clear MAM attribute {attr:x}: {err}");
             }
         }
     }
-- 
2.47.3