VixDiskLib_Read function blocked for more than 2 minutes!

[zero_cc]

I open the disk on advanced transport mode  , but  get blocked frequently for more than 2 minutes while reading the disk.  2048 sectors per read, there are not any error logs;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

lib/ssl: protocol list tls1.2 (openssl flags 0x17000000)

lib/ssl: cipher list !aNULL:kECDH+AESGCM:ECDH+AESGCM:RSA+AESGCM:kECDH+AES:ECDH+AES:RSA+AES

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\ProgramData\VMware): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\ProgramData\VMware): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\ProgramData\VMware): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\ProgramData\VMware): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\ProgramData\VMware): Cannot create a file when that file already exists (183)

VixDiskLibVim: Request RandomAccessRO diskKey = 2000, readOnly = 1, openSnapshot = 0.

VixDiskLibVim: VixDiskLibVim_FreeNfcTicket: Free NFC ticket.

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\Windows): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\Windows\TEMP): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\Windows\TEMP\vmware-SYSTEM): Cannot create a file when that file already exists (183)

FILE: FileCreateDirectoryRetry: Non-retriable error encountered (C:\Windows\TEMP\vmware-SYSTEM\420b2ee9-05a3-b3cf-8116-66912443d783-vm-469): Cannot create a file when that file already exists (183)

VMWARE SCSI Id: Supported VPD pages for  :

0x0

0x80

0x83

0x8f

0xb0

0xb1

0xb2

0xd0

VMWARE SCSI Id: Device id info for :

0x1

0x3

0x0

0x10

0x60

0xd

0x2

0x31

0x0

0x3

0x25

0xda

0x29

0x7

0x88

0x3f

0x79

0xb2

0x89

0xb9

0x1

0x14

0x0

0x4

0x0

0x0

0x0

0xf

0x1

0x15

0x0

0x4

0x0

0x0

0x0

0x1

VMWARE SCSI Id: Id for 

0x60 0x0d 0x02 0x31 0x00 0x03 0x25 0xda 0x29 0x07 0x88 0x3f 0x79 0xb2 0x89 0xb9 0x54 0x48 0x45 0x5f 0x55 0x53

VMWARE SCSI Id: Supported VPD pages for  :

0x0

0x80

0x83

0x87

0x89

0xb0

0xb1

0xb2

0x8a

VMWARE SCSI Id: Device id info for :

0x1

0x3

0x0

0x8

0x50

0x0

0xcc

0xa0

0x97

0xc3

0xc5

0xa3

0x61

0x93

0x0

0x8

0x50

0x3

0x4

0x80

0x1f

0x19

0x73

0x40

0x1

0x14

0x0

0x4

0x0

0x0

0x0

0x0

VMWARE SCSI Id: Id for 

0x50 0x00 0xcc 0xa0 0x97 0xc3 0xc5 0xa3 0x48 0x47 0x53 0x54 0x20 0x48

DISKLIB-LINK  : Opened 'san://snapshot-2117[Backup] VRTS-LINUX/VRTS-LINUX_1-000002.vmdk@192.168.1.118:443?administrator@vsphere.local/XXX' (0x1e): plugin, 146800640 sectors / 70 GB.

DISKLIB-LIB   : Opened "san://snapshot-2117[Backup] VRTS-LINUX/VRTS-LINUX_1-000002.vmdk@192.168.1.118:443?administrator@vsphere.local/XXX" (flags 0x1e, type plugin).

VixDiskLib: VixDiskLib_GetInfo: Retrieve disk info.

VixDiskLib: VixDiskLib_FreeInfo: Clean up VixDiskLib.

VixDiskLib: VixDiskLib_GetTransportMode: Retrieve transport mode.