Unter dmesg | grep -error tauchte immer mal wieder folgende Fehlermeldung auf:
Code
[223093.819756] EXT4-fs (sdc1): unmounting filesystem 068272c6-e213-46d5-b56b-aaac40eb6c7f.
[223093.957259] sd 2:0:0:0: [sdc] Media removed, stopped polling
[223093.972073] sd 2:0:0:0: [sdc] tag#15 device offline or changed
[223093.972096] blk_print_req_error: 16 callbacks suppressed
[223093.972101] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972118] buffer_io_error: 15 callbacks suppressed
[223093.972121] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972149] sd 2:0:0:0: [sdc] tag#12 device offline or changed
[223093.972157] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972167] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972185] sd 2:0:0:0: [sdc] tag#13 device offline or changed
[223093.972192] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972200] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972212] sd 2:0:0:0: [sdc] tag#14 device offline or changed
[223093.972217] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972223] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972229] ldm_validate_partition_table(): Disk read failed.
[223093.972240] sd 2:0:0:0: [sdc] tag#15 device offline or changed
[223093.972245] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972251] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972262] sd 2:0:0:0: [sdc] tag#12 device offline or changed
[223093.972267] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972273] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972284] sd 2:0:0:0: [sdc] tag#13 device offline or changed
[223093.972289] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972295] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972306] sd 2:0:0:0: [sdc] tag#14 device offline or changed
[223093.972311] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972317] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972322] Dev sdc: unable to read RDB block 0
[223093.972333] sd 2:0:0:0: [sdc] tag#15 device offline or changed
[223093.972337] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972343] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972354] sd 2:0:0:0: [sdc] tag#12 device offline or changed
[223093.972359] I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[223093.972365] Buffer I/O error on dev sdc, logical block 0, async page read
[223093.972382] sd 2:0:0:0: [sdc] tag#13 device offline or changed
[223093.972395] sd 2:0:0:0: [sdc] tag#14 device offline or changed
[223093.972400] sdc: unable to read partition table
[223093.977414] sd 2:0:0:0: [sdc] Media removed, stopped polling
[223094.027376] sd 2:0:0:0: [sdc] tag#21 device offline or changed
[223094.027392] sd 2:0:0:0: [sdc] tag#22 device offline or changed
[223094.027398] sd 2:0:0:0: [sdc] tag#23 device offline or changed
[223094.027405] sd 2:0:0:0: [sdc] tag#20 device offline or changed
[223094.027407] ldm_validate_partition_table(): Disk read failed.
[223094.027413] sd 2:0:0:0: [sdc] tag#21 device offline or changed
[223094.027418] sd 2:0:0:0: [sdc] tag#22 device offline or changed
[223094.027423] sd 2:0:0:0: [sdc] tag#23 device offline or changed
[223094.027429] sd 2:0:0:0: [sdc] tag#20 device offline or changed
[223094.027431] Dev sdc: unable to read RDB block 0
[223094.027436] sd 2:0:0:0: [sdc] tag#21 device offline or changed
[223094.027441] sd 2:0:0:0: [sdc] tag#22 device offline or changed
[223094.027450] sd 2:0:0:0: [sdc] tag#23 device offline or changed
[223094.027456] sd 2:0:0:0: [sdc] tag#20 device offline or changed
[223094.027458] sdc: unable to read partition table
[223094.051583] sd 2:0:0:0: [sdc] tag#21 device offline or changed
[223094.051600] sd 2:0:0:0: [sdc] tag#22 device offline or changed
[223094.539265] sd 2:0:0:0: [sdc] Synchronizing SCSI cache
[223094.859401] sd 2:0:0:0: [sdc] Synchronize Cache(10) failed: Result: hostbyte=DID_ERROR
driverbyte=DRIVER_OK
[223094.887790] usb 4-2.1: USB disconnect, device number 6Zuerst hatte ich das Gehäuse/Chipsatz im Verdacht (ist ganz neu), heute habe ich mir mit dmesg -w den ganzen Ablauf beim "Sync & Backup" geordnet anzeigen lassen. Der Fehler trat immer nach dem "sauberen Trennen" des Laufwerkes auf. Die Ext4 Latenz-Konfiguration (Einstellung 'Externe Speicher') ist aktiviert.
Antwort vom Support:
Hallo,
vielen Dank für Ihr Feedback. Das von Ihnen beobachtete Phänomen ist normal. Nach dem ordnungsgemäßen Auswerfen und Entfernen der Festplatte versucht der Kernel nach dem Trennen des Geräts noch kurzzeitig, die Partition zu lesen, was zu einem E/A-Fehler führt. Dies ist ein häufiges Phänomen bei allen externen USB-Festplatten.
Also, kein Grund zur Beunruhigung. 