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ESX/ESXi host becomes unresponsive at vsd-mount when booting after attaching SAN Storage (1014101)

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  • An ESXi/ESX host connected to a SAN becomes unresponsive during the boot process at  Loading VSD-Mount
  • The host boots normally when SAN is disconnected.
  • The host does not drop into a busy box shell.
  • If you press Alt+F12 at the console, you see these messages:

    WARNING: VMW_SATP_LSI: satp_lsi_issueCmdRetryOnLockViolation: MODE_SELECT10 command to path "vmhba1:C0:T0:L0" failed with status = 2/0 0xb 0x44 0x0
    WARNING: VMW_SATP_LSI: satp_lsi_setPreferredController: Could not write mode page data for path "vmhba1:C0:T0:L0"
    WARNING: VMW_SATP_LSI: satp_lsi_setPreferredController: Issuing forced satp_fastt_setPreferredController
    WARNING: VMW_SATP_LSI: satp_lsi_setPreferredController: Could not write mode page data for path "vmhba1:C0:T0:L0"
    WARNING: VMW_SATP_LSI: satp_lsi_tryToActivatePath: Disruptive switch to Standby Path "vmhba1:C0:T0:L0" failed during activation.
    WARNING: NMP: nmp_DeviceAttemptFailover: Retry world failover device " t10.________________" - issuing command 0x4100020d0dc0
    WARNING: NMP: nmp_SelectPathAndIssueCommand: PSP selected path "vmhba1:C0:T0:L0" in a bad state (standby)on device " t10.________________".
    WARNING: NMP: nmp_CompleteRetryForPath: Retry command 0x0 (0x4100020d0dc0) to NMP device " t10.________________" failed on physical path vmhba1:C0:T0:L0" H:0x1 D:0x0 P:0x0 Possible sense data: 0xb 0x44 0x0.
    WARNING: NMP: nmp_CompleteRetryForPath: Logical device "t10.________________": awaiting fast path state update before retrying failed command again...

  • The ESXi/ESX host fails to mount the local vmfs volume while it tries to resolve the issue with mounting the SAN volumes.
  • This issue may occur with, but is not limited to, these disk arrays:
    • IBM DS 4800 FC SAN
    • Sun StorageTek 6140


This issue occurs if the LUNs are presented incorrectly to the ESXi/ESX host.
To resolve this issue, ensure that you follow best practices for disk arrays in ESXi/ESX configuration:
  • Use the Multipathing Checklist in the Fibre Channel or SCSI SAN Configuration Guide for your version of ESXi or ESX.
  • Request a storage configuration best practices from your hardware vendor. Many vendors have a document that explains the configuration settings for use in conjunction with ESXi/ESX.
To work around this issue in the short term and start the ESXi/ESX host:
  1. Power off the ESXi/ESX host.
  2. Disconnect the Fiber Channel cables from the ESXi/ESX host.
  3. Start the host with only local storage available.

Additional Information

To find specific information about the SAN that is failing:
  1. Start the host successfully, reconnect the SAN storage cables and rescan the ESXi/ESX host.
  2. Check the VMkernel logs for messages with id " t10._____________".
  3. Use this information to contact your vendor for specific configuration details.

See Also

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.


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  • 16 Ratings