VSAN-Troubleshooting-Reference-Manual

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Diagnostics and Troubleshooting Reference Manual – Virtual SAN esxcli storage core device stats get This next command is very useful to see if there are failures on the disks that are in the Virtual SAN cluster. Block read and written, as well as read and write operations are of most interest and should be at 0, as shown below. Anything other than 0 may indicate a media issue. If errors and warnings appear in the VMkernel logs related to read and or write problems, this is a useful command for checking the actual state of the physical disks (it is same command in 5.5 & 6.0): ~ # esxcli storage core device stats get naa.600508b1001c4b820b4d80f9f8acfa95 Device: naa.600508b1001c4b820b4d80f9f8acfa95 Successful Commands: 37289717 Blocks Read: 55103809 Blocks Written: 1108650774 Read Operations: 2469633 Write Operations: 34805069 Reserve Operations: 1 Reservation Conflicts: 0 Failed Commands: 14621 Failed Blocks Read: 0 Failed Blocks Written: 0 Failed Read Operations: 0 Failed Write Operations: 0 Failed Reserve Operations: 0 naa.600508b1001c4d41121b41182fa83be4 Device: naa.600508b1001c4d41121b41182fa83be4 Successful Commands: 36336511 Blocks Read: 25348281 Blocks Written: 1122279506 Read Operations: 1104872 Write Operations: 35216624 Reserve Operations: 1 Reservation Conflicts: 0 Failed Commands: 14621 Failed Blocks Read: 0 Failed Blocks Written: 0 Failed Read Operations: 0 Failed Write Operations: 0 Failed Reserve Operations: 0 V M W A R E S T O R A G E B U D O C U M E N T A T I O N / 1 4 0
Diagnostics and Troubleshooting Reference Manual – Virtual SAN Verifying Virtual SAN storage operation – RVC In this section, some RVC commands that can help to verify the state of the storage (both physical disks, and objects and components) are examined. vsan.check_state The vsan.check_state (seen many times already) will check for inaccessible Virtual SAN object, invalid/inaccessible VMs and it will also check if there are any VMs for which VC/hostd/vmx are out of sync. This is an excellent command for making sure that there are no objects or indeed whole VMs with underlying storage issues on the Virtual SAN cluster. When this command reports inaccessible objects and VMs, some object specific commands will be needed to locate the underlying storage and check its status. This will be done shortly. vsan.disks_stats This is a very useful command to determine the following information about disks: Number of components on a disk (for SSDs, this is always 0) Total disk capacity The percentage of disk that is being consumed Health Status of the disk The version of the on-disk format /ie-vcsa-03.ie.local/vsan-dc/computers> vsan.disks_stats 0 +--------------------------------------+--------------------+-------+------+-----------+------+----------+---------+ | | | | Num | Capacity | | | Status | | DisplayName | Host | isSSD | Comp | Total | Used | Reserved | Health | +--------------------------------------+--------------------+-------+------+-----------+------+----------+---------+ | naa.600508b1001c61cedd42b0c3fbf55132 | cs-ie-h01.ie.local | SSD | 0 | 186.27 GB | 0 % | 0 % | OK (v1) | | naa.600508b1001c2ee9a6446e708105054b | cs-ie-h01.ie.local | MD | 12 | 136.50 GB | 3 % | 2 % | OK (v1) | | naa.600508b1001c16be6e256767284eaf88 | cs-ie-h01.ie.local | MD | 14 | 136.50 GB | 12 % | 11 % | OK (v1) | | naa.600508b1001ccd5d506e7ed19c40a64c | cs-ie-h01.ie.local | MD | 14 | 136.50 GB | 2 % | 1 % | OK (v1) | | naa.600508b1001c64816271482a56a48c3c | cs-ie-h01.ie.local | MD | 15 | 136.50 GB | 3 % | 2 % | OK (v1) | | naa.600508b1001c388c92e817e43fcd5237 | cs-ie-h01.ie.local | MD | 14 | 136.50 GB | 4 % | 4 % | OK (v1) | | naa.600508b1001c3ea7838c0436dbe6d7a2 | cs-ie-h01.ie.local | MD | 14 | 136.50 GB | 17 % | 16 % | OK (v1) | | naa.600508b1001c79748e8465571b6f4a46 | cs-ie-h01.ie.local | MD | 14 | 136.50 GB | 3 % | 2 % | OK (v1) | +--------------------------------------+--------------------+-------+------+-----------+------+----------+---------+ | naa.600508b1001c577e11dd042e142a583f | cs-ie-h02.ie.local | SSD | 0 | 186.27 GB | 0 % | 0 % | OK (v1) | | naa.600508b1001ca36381622ca880f3aacd | cs-ie-h02.ie.local | MD | 28 | 136.50 GB | 13 % | 12 % | OK (v1) | | naa.600508b1001cb2234d6ff4f7b1144f59 | cs-ie-h02.ie.local | MD | 18 | 136.50 GB | 10 % | 10 % | OK (v1) | | naa.600508b1001c19335174d82278dee603 | cs-ie-h02.ie.local | MD | 11 | 136.50 GB | 3 % | 3 % | OK (v1) | | naa.600508b1001c0cc0ba2a3866cf8e28be | cs-ie-h02.ie.local | MD | 20 | 136.50 GB | 26 % | 26 % | OK (v1) | | naa.600508b1001c10548f5105fc60246b4a | cs-ie-h02.ie.local | MD | 27 | 136.50 GB | 9 % | 8 % | OK (v1) | | naa.600508b1001c07d525259e83da9541bf | cs-ie-h02.ie.local | MD | 12 | 136.50 GB | 3 % | 2 % | OK (v1) | +--------------------------------------+--------------------+-------+------+-----------+------+----------+---------+ | naa.600508b1001c9c8b5f6f0d7a2be44433 | cs-ie-h03.ie.local | SSD | 0 | 186.27 GB | 0 % | 0 % | OK (v1) | | naa.600508b1001ceefc4213ceb9b51c4be4 | cs-ie-h03.ie.local | MD | 0 | 136.50 GB | 1 % | 0 % | OK (v1) | | naa.600508b1001cd259ab7ef213c87eaad7 | cs-ie-h03.ie.local | MD | 0 | 136.50 GB | 1 % | 0 % | OK (v1) | | naa.600508b1001c1a7f310269ccd51a4e83 | cs-ie-h03.ie.local | MD | 0 | 136.50 GB | 1 % | 0 % | OK (v1) | | naa.600508b1001c9b93053e6dc3ea9bf3ef | cs-ie-h03.ie.local | MD | 0 | 136.50 GB | 1 % | 0 % | OK (v1) | | naa.600508b1001cb11f3292fe743a0fd2e7 | cs-ie-h03.ie.local | MD | 0 | 136.50 GB | 1 % | 0 % | OK (v1) | | naa.600508b1001c2b7a3d39534ac6beb92d | cs-ie-h03.ie.local | MD | 0 | 136.50 GB | 1 % | 0 % | OK (v1) | +--------------------------------------+--------------------+-------+------+-----------+------+----------+---------+ | naa.600508b1001c40e393b73af79eacdcde | cs-ie-h04.ie.local | SSD | 0 | 186.27 GB | 0 % | 0 % | OK (v1) | | naa.600508b1001c51f3a696fe0bbbcb5096 | cs-ie-h04.ie.local | MD | 17 | 136.50 GB | 5 % | 4 % | OK (v1) | | naa.600508b1001c4b820b4d80f9f8acfa95 | cs-ie-h04.ie.local | MD | 15 | 136.50 GB | 6 % | 6 % | OK (v1) | | naa.600508b1001cadff5d80ba7665b8f09a | cs-ie-h04.ie.local | MD | 17 | 136.50 GB | 4 % | 4 % | OK (v1) | | naa.600508b1001c846c000c3d9114ed71b3 | cs-ie-h04.ie.local | MD | 16 | 136.50 GB | 3 % | 3 % | OK (v1) | | naa.600508b1001c258181f0a088f6e40dab | cs-ie-h04.ie.local | MD | 16 | 136.50 GB | 4 % | 4 % | OK (v1) | | naa.600508b1001c4d41121b41182fa83be4 | cs-ie-h04.ie.local | MD | 16 | 136.50 GB | 4 % | 3 % | OK (v1) | +--------------------------------------+--------------------+-------+------+-----------+------+----------+---------+ /ie-vcsa-03.ie.local/vsan-dc/computers> V M W A R E S T O R A G E B U D O C U M E N T A T I O N / 1 4 1
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