csum_discards bei btrfs scrub

XioniX

Member
Hallo!

ich habe beim regulären btrfs scrub eines Volumes viele csum_discards. Diese sind in den btrfs-progs folgendermaßen definiert:

C:
    __u64 csum_discards;        /* # of csum for which no data was found
                     * in the extent tree. */

Muss ich mir hier Gedanken machen und wenn ja, wie kann ich das beheben?

Code:
[root@storagebox ~]# btrfs fi show /storage
Label: none  uuid: 99b6a1c9-5bda-4cc5-bf36-1d0b671b63e8
        Total devices 4 FS bytes used 5.97TiB
        devid    1 size 3.64TiB used 2.99TiB path /dev/sde1
        devid    2 size 3.64TiB used 2.99TiB path /dev/sdb1
        devid    3 size 3.64TiB used 2.99TiB path /dev/sdc1
        devid    4 size 3.64TiB used 2.99TiB path /dev/sdd1

[root@storagebox ~]# btrfs fi df /storage
Data, RAID1: total=5.95TiB, used=5.95TiB
System, RAID1C4: total=32.00MiB, used=864.00KiB
Metadata, RAID1C4: total=17.00GiB, used=16.69GiB
GlobalReserve, single: total=512.00MiB, used=0.00B

[root@storagebox ~]# btrfs scrub status -R /storage
UUID:             99b6a1c9-5bda-4cc5-bf36-1d0b671b63e8
Scrub started:    Sun May  1 18:14:27 2022
Status:           finished
Duration:         9:39:52
        data_extents_scrubbed: 254287474
        tree_extents_scrubbed: 4374428
        data_bytes_scrubbed: 13089576476672
        tree_bytes_scrubbed: 71670628352
        read_errors: 0
        csum_errors: 0
        verify_errors: 0
        no_csum: 0
        csum_discards: 3195697382
        super_errors: 0
        malloc_errors: 0
        uncorrectable_errors: 0
        unverified_errors: 0
        corrected_errors: 0
        last_physical: 3293175611392
        
[root@storagebox ~]# btrfs su list -at /storage
ID      gen     top level       path
--      ---     ---------       ----
258     59736   5               main
259     59736   5               .snapshots/main-2021.12.20-22.54.45
[...]
270     59736   5               .snapshots/main-2022.04.29-17.51.39
 
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