Hello,
I own a Samsung U.2 pro ssd, it’s pcie 3 / nvme interface.
Today i get strange behavior.. I have error in qbittorrent that said there is no more free space on the device (there is 2.7 TB to free space…). It also said the device is in read only mode, and indeed i couldn’t access my data anyhow. A reboot solve the problem but it seems temporary.
I must specify i have a power-down in my home today and the device was in use.
I tried a btrfs check with gparted, and it gives an error.
> btrfs check '/dev/nvme1n1p1' 00:00:21 ( ERREUR )
>
> [1/7] checking root items
> [2/7] checking extents
> [3/7] checking free space cache
> there is no free space entry for 3554107473920-3554107523072
> cache appears valid but isn't 3554107457536
> Duplicate entries in free space cache
> failed to load free space cache for block group 6284632915968
> btrfs: unable to add free space :-17
> kernel-shared/free-space-cache.c:883: merge_space_tree: BUG_ON `ret` triggered, value -17
> btrfs(load_free_space_cache+0x108f)[0x55dfe2694d8f]
> btrfs(+0x8716a)[0x55dfe26e516a]
> btrfs(main+0x93)[0x55dfe26750e3]
> /usr/lib/libc.so.6(+0x23290)[0x7fafb2f19290]
> /usr/lib/libc.so.6(__libc_start_main+0x8a)[0x7fafb2f1934a]
> btrfs(_start+0x25)[0x55dfe2675435]
The result of
> sudo smartctl -x -q noserial /dev/nvme1
> smartctl 7.3 2022-02-28 r5338 [x86_64-linux-6.0.2-2-MANJARO] (local build)
> Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org
>
> === START OF INFORMATION SECTION ===
> Model Number: SAMSUNG MZQLB7T6HMLA-00007
> Firmware Version: EDB5002Q
> PCI Vendor/Subsystem ID: 0x144d
> IEEE OUI Identifier: 0x002538
> Total NVM Capacity: 7 681 501 126 656 [7,68 TB]
> Unallocated NVM Capacity: 0
> Controller ID: 4
> NVMe Version: 1.2
> Number of Namespaces: 1
> Namespace 1 Size/Capacity: 7 681 501 126 656 [7,68 TB]
> Namespace 1 Utilization: 6 317 451 087 872 [6,31 TB]
> Namespace 1 Formatted LBA Size: 512
> Local Time is: Sun Oct 23 02:56:54 2022 CEST
> Firmware Updates (0x17): 3 Slots, Slot 1 R/O, no Reset required
> Optional Admin Commands (0x000f): Security Format Frmw_DL NS_Mngmt
> Optional NVM Commands (0x001f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat
> Log Page Attributes (0x03): S/H_per_NS Cmd_Eff_Lg
> Maximum Data Transfer Size: 512 Pages
> Warning Comp. Temp. Threshold: 86 Celsius
> Critical Comp. Temp. Threshold: 87 Celsius
> Namespace 1 Features (0x02): NA_Fields
>
> Supported Power States
> St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
> 0 + 10.60W - - 0 0 0 0 0 0
>
> Supported LBA Sizes (NSID 0x1)
> Id Fmt Data Metadt Rel_Perf
> 0 + 512 0 0
> 1 - 4096 0 0
>
> === START OF SMART DATA SECTION ===
> SMART overall-health self-assessment test result: PASSED
>
> SMART/Health Information (NVMe Log 0x02)
> Critical Warning: 0x00
> Temperature: 35 Celsius
> Available Spare: 100%
> Available Spare Threshold: 10%
> Percentage Used: 0%
> Data Units Read: 134 841 383 [69,0 TB]
> Data Units Written: 80 366 567 [41,1 TB]
> Host Read Commands: 261 484 642
> Host Write Commands: 257 476 881
> Controller Busy Time: 1 141
> Power Cycles: 1 731
> Power On Hours: 14 885
> Unsafe Shutdowns: 272
> Media and Data Integrity Errors: 2
> Error Information Log Entries: 3 613
> Warning Comp. Temperature Time: 0
> Critical Comp. Temperature Time: 0
> Temperature Sensor 1: 35 Celsius
> Temperature Sensor 2: 40 Celsius
> Temperature Sensor 3: 47 Celsius
>
> Error Information (NVMe Log 0x01, 16 of 64 entries)
> Num ErrCount SQId CmdId Status PELoc LBA NSID VS
> 0 3613 0 0x0000 0x4004 - 0 0 -
)