Hdd's device missing for a short time

Hi, I'm using WRT1200AC V1 from linksys.
the system is 19.07.2, r10947-65030d81f3
I'm mounting a 4T hdd USB disk and a 2T hdd USB disk to the router through a usb3.0 Hub(no external power for the hub, and an external power for the 2T disk).
I read/write the 4T disk a lot. And it randomly (happens like once for 2 or 3 days) disappears from the mount point, like unmounted. but soon the router discovers a new device, the /dev/sdaX disappears and a /dev/sdcX appears.

The kernel log tells not much, it only shows like
usb disconnect, device number = 3
and after that,
new SuperSpeed USB device number 5 using xhci-hcd
and a lot of error messages.
Does this look like a driver issue or a power issue?
here is the detailed log:

[71252.997119] ieee80211 phy0: Mac80211 start BA 94:bf:2d:2f:af:a9
[71253.247467] ieee80211 phy0: Stop BA 70:ea:5a:59:2d:09
[72287.725772] ieee80211 phy0: Mac80211 start BA 94:bf:2d:2f:af:a9
[72289.088745] ieee80211 phy0: Stop BA 70:ea:5a:59:2d:09
[75899.151245] ieee80211 phy0: Mac80211 start BA 70:ea:5a:59:2d:09
[75900.165818] ieee80211 phy0: Stop BA 94:bf:2d:2f:af:a9
[76617.286327] ieee80211 phy0: Mac80211 start BA 80:e6:50:12:22:40
[76617.409498] ieee80211 phy0: Stop BA 70:ea:5a:59:2d:09
[76840.501973] usb 3-1.3: USB disconnect, device number 3
[76840.542561] sd 2:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x01 driverbyte=0x00
[76840.550798] sd 2:0:0:0: [sda] tag#0 CDB: opcode=0x35 35 00 00 00 00 00 00 00 00 00
[76840.558433] print_req_error: I/O error, dev sda, sector 3905619368
[76840.564656] Aborting journal on device sda2-8.
[76840.564750] sd 2:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x01 driverbyte=0x00
[76840.569352] JBD2: Error -5 detected when updating journal superblock for sda2-8.
[76840.577360] sd 2:0:0:0: [sda] tag#0 CDB: opcode=0x88 88 00 00 00 00 01 5c a2 67 a8 00 00 00 80 00 00
[76840.577364] print_req_error: I/O error, dev sda, sector 5849114536
[76840.600259] print_req_error: I/O error, dev sda, sector 0
[76840.702892] sd 2:0:0:0: [sda] Synchronizing SCSI cache
[76840.708556] sd 2:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=0x01 driverbyte=0x00
[76840.936218] blk_partition_remap: fail for partition 2
[76840.941314] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76840.953180] blk_partition_remap: fail for partition 2
[76840.958432] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76840.970190] blk_partition_remap: fail for partition 2
[76840.975291] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.015569] blk_partition_remap: fail for partition 2
[76841.020845] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.032542] blk_partition_remap: fail for partition 2
[76841.037752] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.049724] blk_partition_remap: fail for partition 2
[76841.054819] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.115153] blk_partition_remap: fail for partition 2
[76841.120300] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.132216] blk_partition_remap: fail for partition 2
[76841.137337] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.149079] blk_partition_remap: fail for partition 2
[76841.154168] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.195256] blk_partition_remap: fail for partition 2
[76841.200424] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76841.212085] blk_partition_remap: fail for partition 2
[76841.217252] blk_partition_remap: fail for partition 2
[76841.235448] blk_partition_remap: fail for partition 2
[76841.240541] blk_partition_remap: fail for partition 2
[76841.245908] blk_partition_remap: fail for partition 2
[76841.274778] blk_partition_remap: fail for partition 2
[76841.279937] blk_partition_remap: fail for partition 2
[76841.285103] blk_partition_remap: fail for partition 2
[76841.315734] blk_partition_remap: fail for partition 2
[76841.320826] blk_partition_remap: fail for partition 2
[76841.325939] blk_partition_remap: fail for partition 2
[76841.335434] blk_partition_remap: fail for partition 2
[76841.340532] blk_partition_remap: fail for partition 2
[76841.375755] blk_partition_remap: fail for partition 2
[76841.380856] blk_partition_remap: fail for partition 2
[76841.386303] blk_partition_remap: fail for partition 2
[76841.391393] blk_partition_remap: fail for partition 2
[76841.396509] blk_partition_remap: fail for partition 2
[76841.433494] usb 3-1.3: new SuperSpeed USB device number 5 using xhci-hcd
[76841.456679] blk_partition_remap: fail for partition 2
[76841.461773] blk_partition_remap: fail for partition 2
[76841.466073] usb-storage 3-1.3:1.0: USB Mass Storage device detected
[76841.466907] blk_partition_remap: fail for partition 2
[76841.478347] scsi host4: usb-storage 3-1.3:1.0
[76841.542609] blk_partition_remap: fail for partition 2
[76841.547779] blk_partition_remap: fail for partition 2
[76841.575739] blk_partition_remap: fail for partition 2
[76841.580835] blk_partition_remap: fail for partition 2
[76841.664278] blk_partition_remap: fail for partition 2
[76841.669560] blk_partition_remap: fail for partition 2
[76841.703536] blk_partition_remap: fail for partition 2
[76841.708641] blk_partition_remap: fail for partition 2
[76841.713821] blk_partition_remap: fail for partition 2
[76841.719274] blk_partition_remap: fail for partition 2
[76841.756001] blk_partition_remap: fail for partition 2
[76841.761094] blk_partition_remap: fail for partition 2
[76841.766414] blk_partition_remap: fail for partition 2
[76841.771511] blk_partition_remap: fail for partition 2
[76841.777209] blk_partition_remap: fail for partition 2
[76841.782312] blk_partition_remap: fail for partition 2
[76841.796556] blk_partition_remap: fail for partition 2
[76841.801649] blk_partition_remap: fail for partition 2
[76841.806765] blk_partition_remap: fail for partition 2
[76841.811859] blk_partition_remap: fail for partition 2
[76841.818721] blk_partition_remap: fail for partition 2
[76841.876467] blk_partition_remap: fail for partition 2
[76841.881562] blk_partition_remap: fail for partition 2
[76841.962523] blk_partition_remap: fail for partition 2
[76841.967647] blk_partition_remap: fail for partition 2
[76841.997384] blk_partition_remap: fail for partition 2
[76842.002712] blk_partition_remap: fail for partition 2
[76842.074516] blk_partition_remap: fail for partition 2
[76842.079621] blk_partition_remap: fail for partition 2
[76842.136627] blk_partition_remap: fail for partition 2
[76842.141724] blk_partition_remap: fail for partition 2
[76842.289336] blk_partition_remap: fail for partition 2
[76842.294578] blk_partition_remap: fail for partition 2
[76842.317237] blk_partition_remap: fail for partition 2
[76842.322336] blk_partition_remap: fail for partition 2
[76842.356399] blk_partition_remap: fail for partition 2
[76842.361499] blk_partition_remap: fail for partition 2
[76842.397383] blk_partition_remap: fail for partition 2
[76842.402518] blk_partition_remap: fail for partition 2
[76842.423243] blk_partition_remap: fail for partition 2
[76842.428903] blk_partition_remap: fail for partition 2
[76842.438648] blk_partition_remap: fail for partition 2
[76842.443892] blk_partition_remap: fail for partition 2
[76842.488028] blk_partition_remap: fail for partition 2
[76842.493132] blk_partition_remap: fail for partition 2
[76842.510106] blk_partition_remap: fail for partition 2
[76842.515231] blk_partition_remap: fail for partition 2
[76842.537976] blk_partition_remap: fail for partition 2
[76842.543075] blk_partition_remap: fail for partition 2
[76842.577420] blk_partition_remap: fail for partition 2
[76842.582517] blk_partition_remap: fail for partition 2
[76842.617483] blk_partition_remap: fail for partition 2
[76842.622586] blk_partition_remap: fail for partition 2
[76842.657884] blk_partition_remap: fail for partition 2
[76842.663041] blk_partition_remap: fail for partition 2
[76842.698752] blk_partition_remap: fail for partition 2
[76842.703863] blk_partition_remap: fail for partition 2
[76842.738686] blk_partition_remap: fail for partition 2
[76842.743814] blk_partition_remap: fail for partition 2
[76842.777866] blk_partition_remap: fail for partition 2
[76842.782965] blk_partition_remap: fail for partition 2
[76842.818652] blk_partition_remap: fail for partition 2
[76842.824112] blk_partition_remap: fail for partition 2
[76842.858588] blk_partition_remap: fail for partition 2
[76842.864036] blk_partition_remap: fail for partition 2
[76842.898637] blk_partition_remap: fail for partition 2
[76842.903738] blk_partition_remap: fail for partition 2
[76842.938727] blk_partition_remap: fail for partition 2
[76842.944139] blk_partition_remap: fail for partition 2
[76842.978425] blk_partition_remap: fail for partition 2
[76842.983529] blk_partition_remap: fail for partition 2
[76843.017627] blk_partition_remap: fail for partition 2
[76843.022730] blk_partition_remap: fail for partition 2
[76843.057214] blk_partition_remap: fail for partition 2
[76843.062311] blk_partition_remap: fail for partition 2
[76843.097041] blk_partition_remap: fail for partition 2
[76843.102136] blk_partition_remap: fail for partition 2
[76843.137127] blk_partition_remap: fail for partition 2
[76843.142231] blk_partition_remap: fail for partition 2
[76843.177160] blk_partition_remap: fail for partition 2
[76843.182593] blk_partition_remap: fail for partition 2
[76843.217790] blk_partition_remap: fail for partition 2
[76843.222886] blk_partition_remap: fail for partition 2
[76843.257000] blk_partition_remap: fail for partition 2
[76843.262101] blk_partition_remap: fail for partition 2
[76843.297796] blk_partition_remap: fail for partition 2
[76843.302897] blk_partition_remap: fail for partition 2
[76843.337904] blk_partition_remap: fail for partition 2
[76843.343177] blk_partition_remap: fail for partition 2
[76843.378012] blk_partition_remap: fail for partition 2
[76843.383111] blk_partition_remap: fail for partition 2
[76843.417736] blk_partition_remap: fail for partition 2
[76843.422838] blk_partition_remap: fail for partition 2
[76843.458569] blk_partition_remap: fail for partition 2
[76843.463679] blk_partition_remap: fail for partition 2
[76843.498372] blk_partition_remap: fail for partition 2
[76843.503468] blk_partition_remap: fail for partition 2
[76843.537758] blk_partition_remap: fail for partition 2
[76843.542853] blk_partition_remap: fail for partition 2
[76843.577589] blk_partition_remap: fail for partition 2
[76843.582682] blk_partition_remap: fail for partition 2
[76843.617802] blk_partition_remap: fail for partition 2
[76843.622906] blk_partition_remap: fail for partition 2
[76843.658023] blk_partition_remap: fail for partition 2
[76843.663142] blk_partition_remap: fail for partition 2
[76843.698835] blk_partition_remap: fail for partition 2
[76843.703935] blk_partition_remap: fail for partition 2
[76843.720098] scsi 4:0:0:0: Direct-Access     TOSHIBA  External USB 3.0 5438 PQ: 0 ANSI: 6
[76843.730170] sd 4:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
[76843.737717] sd 4:0:0:0: [sdc] 7814037164 512-byte logical blocks: (4.00 TB/3.64 TiB)
[76843.745557] sd 4:0:0:0: [sdc] 4096-byte physical blocks
[76843.746222] blk_partition_remap: fail for partition 2
[76843.756160] blk_partition_remap: fail for partition 2
[76843.759658] sd 4:0:0:0: [sdc] Write Protect is off
[76843.766220] sd 4:0:0:0: [sdc] Mode Sense: 23 00 00 00
[76843.771662] sd 4:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[76843.781353] blk_partition_remap: fail for partition 2
[76843.786605] blk_partition_remap: fail for partition 2
[76843.822114] blk_partition_remap: fail for partition 2
[76843.827283] blk_partition_remap: fail for partition 2
[76843.857818] blk_partition_remap: fail for partition 2
[76843.862932] blk_partition_remap: fail for partition 2
[76843.918471] blk_partition_remap: fail for partition 2
[76843.978056] blk_partition_remap: fail for partition 2
[76843.983240] blk_partition_remap: fail for partition 2
[76844.018224] blk_partition_remap: fail for partition 2
[76844.023388] blk_partition_remap: fail for partition 2
[76844.058545] blk_partition_remap: fail for partition 2
[76844.063650] blk_partition_remap: fail for partition 2
[76844.099834] blk_partition_remap: fail for partition 2
[76844.105053] blk_partition_remap: fail for partition 2
[76844.138151] blk_partition_remap: fail for partition 2
[76844.143257] blk_partition_remap: fail for partition 2
[76844.178539] blk_partition_remap: fail for partition 2
[76844.183645] blk_partition_remap: fail for partition 2
[76844.218156] blk_partition_remap: fail for partition 2
[76844.223321] blk_partition_remap: fail for partition 2
[76844.259656] blk_partition_remap: fail for partition 2
[76844.264885] blk_partition_remap: fail for partition 2
[76844.299205] blk_partition_remap: fail for partition 2
[76844.304366] blk_partition_remap: fail for partition 2
[76844.338838] blk_partition_remap: fail for partition 2
[76844.344030] blk_partition_remap: fail for partition 2
[76844.404267]  sdc: sdc1 sdc2
[76844.408747] sd 4:0:0:0: [sdc] Attached SCSI disk
[76844.431468] blk_partition_remap: fail for partition 2
[76844.436625] blk_partition_remap: fail for partition 2
[76844.458155] blk_partition_remap: fail for partition 2
[76844.463256] blk_partition_remap: fail for partition 2
[76844.498781] blk_partition_remap: fail for partition 2
[76844.503915] blk_partition_remap: fail for partition 2
[76844.558741] blk_partition_remap: fail for partition 2
[76844.563865] blk_partition_remap: fail for partition 2
[76844.598816] blk_partition_remap: fail for partition 2
[76844.603923] blk_partition_remap: fail for partition 2
[76844.639344] blk_partition_remap: fail for partition 2
[76844.644451] blk_partition_remap: fail for partition 2
[76844.678687] blk_partition_remap: fail for partition 2
[76844.683794] blk_partition_remap: fail for partition 2
[76844.788723] blk_partition_remap: fail for partition 2
[76844.793833] blk_partition_remap: fail for partition 2
[76844.820515] blk_partition_remap: fail for partition 2
[76844.825675] blk_partition_remap: fail for partition 2
[76844.858896] blk_partition_remap: fail for partition 2
[76844.864001] blk_partition_remap: fail for partition 2
[76844.918719] blk_partition_remap: fail for partition 2
[76844.923910] blk_partition_remap: fail for partition 2
[76844.958896] blk_partition_remap: fail for partition 2
[76845.021104] blk_partition_remap: fail for partition 2
[76845.026310] blk_partition_remap: fail for partition 2
[76845.061434] blk_partition_remap: fail for partition 2
[76845.066548] blk_partition_remap: fail for partition 2
[76845.105214] blk_partition_remap: fail for partition 2
[76845.110362] blk_partition_remap: fail for partition 2
[76845.139292] blk_partition_remap: fail for partition 2
[76845.144492] blk_partition_remap: fail for partition 2
[76845.179630] blk_partition_remap: fail for partition 2
[76845.184733] blk_partition_remap: fail for partition 2
[76845.222246] blk_partition_remap: fail for partition 2
[76845.227368] blk_partition_remap: fail for partition 2
[76845.259379] blk_partition_remap: fail for partition 2
[76845.264489] blk_partition_remap: fail for partition 2
[76845.310153] blk_partition_remap: fail for partition 2
[76845.315259] blk_partition_remap: fail for partition 2
[76845.464379] blk_partition_remap: fail for partition 2
[76845.469506] blk_partition_remap: fail for partition 2
[76845.501366] blk_partition_remap: fail for partition 2
[76845.506478] blk_partition_remap: fail for partition 2
[76845.543144] blk_partition_remap: fail for partition 2
[76845.548297] blk_partition_remap: fail for partition 2
[76845.599481] blk_partition_remap: fail for partition 2
[76845.604683] blk_partition_remap: fail for partition 2
[76850.664483] blk_partition_remap: fail for partition 2
[76850.669672] EXT4-fs warning: 204 callbacks suppressed
[76850.669678] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76855.348964] blk_partition_remap: fail for partition 2
[76855.354175] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76855.769946] blk_partition_remap: fail for partition 2
[76855.775056] EXT4-fs warning (device sda2): dx_probe:758: inode #130416643: lblock 0: comm smbd: error -5 reading directory block
[76872.784833] blk_partition_remap: fail for partition 2
[76872.789929] EXT4-fs warning (device sda2): htree_dirblock_to_tree:994: inode #2: lblock 0: comm ls: error -5 reading directory block

I/O errors are never a good sign.
Have you already done a filesystem check?

1 Like

I would also plug the drive in a computer, and do a whole surface check (use "badblocks", for example).

That is a lot of load on the router's power supply, so your 4TB might just be disconnecting during the power brownouts or router overload.

It could also be because the drive had already dropped off...

I've done a badblocks check, there is 0 errors

I have now done a badblock check, it took a whole day...
the result show no abnormality

root@hukang-pc:~# badblocks -sv /dev/sdc2 >badblocks.txt
Checking blocks 0 to 3906680831
Checking for bad blocks (read-only test): done                                                 
Pass completed, 0 bad blocks found. (0/0/0 errors)

If so, directly connecting the 4T driver(2.5 inch) to USB3.0 without a Hub should be stable. I will try this later.

Also make sure the power supply to the router is the same or higher amperage as the router is rated to. The hub itself probably wouldn't take up much power though.

Do both hard drives function ok if only one of them is connected at a time?

The power supply is the original. The 2T driver functions well for years, but the driver comes with a power supply as it is a 3.5 inch device.
The 4T is new 2.5 inch usb disk. The 3.5 inch disk should not consume additional power as it is already powered by external power supply.
I will try to connect only the 4T and see if it's stable.

That is not what I meant. The drives need their own power or get a hub with its own power so it can power the drives.

Most of the hub from the market don't come with a power supply, and mine too.
Anyway, if reducing the intermediate device works, this will be more likely a power issue.

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