Bug 94911
| Summary: | Wrong size of device unallocated and wrong size of free (estimated): 8EiB or 16EiB | ||
|---|---|---|---|
| Product: | File System | Reporter: | raffix |
| Component: | btrfs | Assignee: | Josef Bacik (josef) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | dsterba |
| Priority: | P1 | ||
| Hardware: | x86-64 | ||
| OS: | Linux | ||
| Kernel Version: | 3.16.0 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
8.00EiB is a result of interpretting a negative signed 64bit number as unsigned. The negative number is probably caused by wrong calculations, in your case probably due to the degraded mount. Reproduced and fix will be sent to mailinglist. Thank you very much for your work! |
btrfs-tools version is 3.18.2 I have two 1.5TB drives in a RAID1 configuration. sudo btrfs fi df /home Data, RAID1: total=972.00GiB, used=962.17GiB System, RAID1: total=32.00MiB, used=176.00KiB Metadata, RAID1: total=3.00GiB, used=1.18GiB GlobalReserve, single: total=416.00MiB, used=0.00B For testing purposes I switched off one of them and mounted the left one in degraded mode: sudo btrfs fi sh /home Label: none uuid: 6f5413f9-c99c-499c-b6ed-2440cb5acd2f Total devices 2 FS bytes used 963.33GiB devid 1 size 1.36TiB used 975.03GiB path /dev/sdb1 *** Some devices missing However, the command: "btrfs fi us /home" shows a complete wrong result. The entry "Device unallocated" says 16.00EiB (Exbibyte !!). I can assure you, I have only one 1.5TB device. ;-) sudo btrfs fi us /home Overall: Device size: 1.36TiB Device allocated: 1.90TiB Device unallocated: 16.00EiB <--- WRONG!! Used: 1.88TiB Free (estimated): 8.00EiB (min: 8.00EiB) <--- WRONG!! Data ratio: 2.00 Metadata ratio: 2.00 Global reserve: 416.00MiB (used: 0.00B) Data,RAID1: Size:972.00GiB, Used:962.15GiB 972.00GiB /dev/sdb1 972.00GiB Metadata,RAID1: Size:3.00GiB, Used:1.18GiB 3.00GiB /dev/sdb1 3.00GiB System,RAID1: Size:32.00MiB, Used:176.00KiB 32.00MiB /dev/sdb1 32.00MiB Unallocated: 422.23GiB /dev/sdb1 422.23GiB