iscsi error?

[fastboar154]

Hello Guys
i've solved my switch issue with iscsi and multipath and now all error getting issue for timeout and disconnection are gone but now i've this and i don't have alua enabled on any hosts

journalctl -xe
May 24 18:10:47 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:10:47 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:10:47 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:11:07 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:11:27 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:11:47 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: supports implicit TPGS
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: No device descriptors found
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: port group 1 rel port 2
May 24 18:12:08 host01 kernel: sd 15:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:12:14 host01 pvedaemon[40128]: <root@pam> end task UPID:host01:0004372A:0037B583:6831EF53:vncproxy:103:root>
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:12:28 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:12:48 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:13:07 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
set mark: ...skipping...
May 24 18:10:47 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:10:47 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:10:47 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:11:07 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:11:07 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:11:27 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:11:27 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:11:47 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:11:47 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: supports implicit TPGS
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: No device descriptors found
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: port group 1 rel port 2
May 24 18:12:08 host01 kernel: sd 15:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
May 24 18:12:08 host01 kernel: sd 15:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:12:14 host01 pvedaemon[40128]: <root@pam> end task UPID:host01:0004372A:0037B583:6831EF53:vncproxy:103:root>
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:12:28 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:12:28 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:12:48 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:12:48 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: supports implicit TPGS
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: No device descriptors found
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: port group 0 rel port 1
May 24 18:13:07 host01 kernel: sd 16:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
May 24 18:13:07 host01 kernel: sd 16:0:0:0: alua: transition timeout set to 60 seconds

 

[alexskysilk]

and i don't have alua enabled on any hosts

alua is a feature on the target. The host will attempt to distribute traffic as allowed. Read the documentation of your storage for proper configuration of multipathd.

 

[fastboar154]

but is not an error which can cause issue right?

 

[alexskysilk]

Probably not, but the presence of that message suggests there are optimizations available for you to take advantage of. My original suggestion stands

 

[fastboar154]

devices {
    device {
        vendor "QSAN"
        product ".*"          # Matcha tutti i modelli QSAN legacy
        path_grouping_policy  "failover"       # Policy predefinita per storage legacy
        path_selector         "round-robin 0"  # Bilanciamento I/O base
        path_checker          "tur"            # Usa TEST UNIT READY per verificare i path
        features              "0"              # Disabilita features avanzate (spesso non supportate)
        prio                  "const"          # Priorità fissa (no ALUA su QSAN legacy)
        failback              "manual"         # Evita switch automatici (può causare instabilità)
        no_path_retry         5               # Tentativi prima di disabilitare il device
        rr_min_io             100             # Ottimizzazione I/O per round-robin
        fast_io_fail_tmo      5              # Timeout fail rapido (secondi)
        dev_loss_tmo          30             # Timeout rimozione dispositivo
    }
}

understood thank you but i can't enable alua on legacy storage suggested by vendor