VSAN-Troubleshooting-Reference-Manual
VSAN-Troubleshooting-Reference-Manual
VSAN-Troubleshooting-Reference-Manual
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Diagnostics and <strong>Troubleshooting</strong> <strong>Reference</strong> <strong>Manual</strong> – Virtual SAN<br />
esxcli storage core device stats get ........................................................................................................... 140<br />
VERIFYING VIRTUAL SAN STORAGE OPERATION – RVC ............................................................................. 141<br />
vsan.check_state ................................................................................................................................................. 141<br />
vsan.disks_stats ................................................................................................................................................... 141<br />
VIRTUAL SAN DATASTORE SPACE MANAGEMENT ........................................................................................ 142<br />
Maintenance Mode ........................................................................................................................................... 142<br />
SSD, magnetic disk or host failure ............................................................................................................. 143<br />
Small disk drive capacity considerations ............................................................................................... 143<br />
Very large VMDK considerations ............................................................................................................... 144<br />
CHANGING A VM STORAGE POLICY DYNAMICALLY ...................................................................................... 144<br />
PROVISIONING WITH A POLICY THAT CANNOT BE IMPLEMENTED ............................................................. 145<br />
What happens when a threshold is reached? ....................................................................................... 145<br />
COMPONENT DISTRIBUTION ON VIRTUAL SAN ............................................................................................ 146<br />
Checking disk usage distribution with RVC – vsan.disks_stats ..................................................... 146<br />
Checking component distribution with RVC – vsan.disks_limits ................................................. 146<br />
PROACTIVELY BALANCING COMPONENT DISTRIBUTION WITH RVC ......................................................... 147<br />
vsan.proactive_rebalance .............................................................................................................................. 147<br />
VIRTUAL SAN FAILURE REMEDIATION – REBUILDING COMPONENTS ....................................................... 149<br />
vsan.resync_dashboard ................................................................................................................................... 150<br />
vsan.vm_object_info .......................................................................................................................................... 150<br />
vsan.resync_dashboard ................................................................................................................................... 151<br />
TESTING VIRTUAL SAN FUNCTIONALITY - DEPLOYING VMS ..................................................................... 152<br />
diagnostics.vm_create ..................................................................................................................................... 152<br />
diagnostics.vm_create failure – clomd not running .......................................................................... 152<br />
COMMON STORAGE PROBLEMS AND RESOLUTIONS ...................................................................................... 153<br />
Virtual SAN claiming disks but capacity not correct ........................................................................ 153<br />
Virtual SAN not claiming disks - existing partition information ................................................ 153<br />
esxcli vsan storage remove ........................................................................................................................... 154<br />
partedUtil .............................................................................................................................................................. 154<br />
Virtual SAN not claiming disks - Is Local: false ................................................................................... 154<br />
VIRTUAL SAN STORAGE DEVICE FAILURE OBSERVATIONS.......................................................................... 156<br />
Observations when a disk is failed/removed in a controlled manner ...................................... 156<br />
esxcli vsan storage list - unknown ............................................................................................................. 158<br />
vdq –qH: IsPDL.................................................................................................................................................... 159<br />
Observations when a flash device fails .................................................................................................... 160<br />
Observations when a storage controller fails....................................................................................... 161<br />
Storage controller replacement ................................................................................................................. 162<br />
Expectations when a drive is reporting errors .................................................................................... 162<br />
BLINKING LEDS ON DRIVES.............................................................................................................................. 163<br />
PREDICTIVE REPORTING - SMARTD ................................................................................................................. 164<br />
esxcli storage core device smart get ......................................................................................................... 164<br />
CONSIDERATIONS WHEN CLONING ON VIRTUAL SAN ................................................................................. 165<br />
A NOTE ABOUT <strong>VSAN</strong>SPARSE VIRTUAL DISK FORMAT .................................................................................. 165<br />
SUMMARY CHECKLIST FOR VIRTUAL SAN STORAGE .................................................................................... 166<br />
12. TROUBLESHOOTING VIRTUAL SAN UPGRADES................................................................ 167<br />
VIRTUAL SAN UPGRADE - ON-DISK FORMAT V2 ........................................................................................... 167<br />
Before you start upgrading the on-disk format .................................................................................. 167<br />
On-disk format upgrade pre-check: vsan.disks_stats ........................................................................ 168<br />
On-disk format upgrade: vsan.v2_ondisk_upgrade ........................................................................... 169<br />
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 / 6