| Jerome Marchand | 0e53c2b | 2008-02-08 11:10:56 +0100 | [diff] [blame] | 1 | What: /sys/block/<disk>/stat |
| 2 | Date: February 2008 |
| 3 | Contact: Jerome Marchand <jmarchan@redhat.com> |
| 4 | Description: |
| 5 | The /sys/block/<disk>/stat files displays the I/O |
| 6 | statistics of disk <disk>. They contain 11 fields: |
| 7 | 1 - reads completed succesfully |
| 8 | 2 - reads merged |
| 9 | 3 - sectors read |
| 10 | 4 - time spent reading (ms) |
| 11 | 5 - writes completed |
| 12 | 6 - writes merged |
| 13 | 7 - sectors written |
| 14 | 8 - time spent writing (ms) |
| 15 | 9 - I/Os currently in progress |
| 16 | 10 - time spent doing I/Os (ms) |
| 17 | 11 - weighted time spent doing I/Os (ms) |
| 18 | For more details refer Documentation/iostats.txt |
| 19 | |
| 20 | |
| 21 | What: /sys/block/<disk>/<part>/stat |
| 22 | Date: February 2008 |
| 23 | Contact: Jerome Marchand <jmarchan@redhat.com> |
| 24 | Description: |
| 25 | The /sys/block/<disk>/<part>/stat files display the |
| 26 | I/O statistics of partition <part>. The format is the |
| 27 | same as the above-written /sys/block/<disk>/stat |
| 28 | format. |
| Martin K. Petersen | c1c72b5 | 2008-06-17 18:59:57 +0200 | [diff] [blame] | 29 | |
| 30 | |
| 31 | What: /sys/block/<disk>/integrity/format |
| 32 | Date: June 2008 |
| 33 | Contact: Martin K. Petersen <martin.petersen@oracle.com> |
| 34 | Description: |
| 35 | Metadata format for integrity capable block device. |
| 36 | E.g. T10-DIF-TYPE1-CRC. |
| 37 | |
| 38 | |
| 39 | What: /sys/block/<disk>/integrity/read_verify |
| 40 | Date: June 2008 |
| 41 | Contact: Martin K. Petersen <martin.petersen@oracle.com> |
| 42 | Description: |
| 43 | Indicates whether the block layer should verify the |
| 44 | integrity of read requests serviced by devices that |
| 45 | support sending integrity metadata. |
| 46 | |
| 47 | |
| 48 | What: /sys/block/<disk>/integrity/tag_size |
| 49 | Date: June 2008 |
| 50 | Contact: Martin K. Petersen <martin.petersen@oracle.com> |
| 51 | Description: |
| 52 | Number of bytes of integrity tag space available per |
| 53 | 512 bytes of data. |
| 54 | |
| 55 | |
| 56 | What: /sys/block/<disk>/integrity/write_generate |
| 57 | Date: June 2008 |
| 58 | Contact: Martin K. Petersen <martin.petersen@oracle.com> |
| 59 | Description: |
| 60 | Indicates whether the block layer should automatically |
| 61 | generate checksums for write requests bound for |
| 62 | devices that support receiving integrity metadata. |