Cannot use local SSD to create vFlash Cache. The disk appears to have an existing partition that cannot be deleted.

I did a fresh install of ESXi 5.5 on a SD card in the server. The SSD disk should have nothing on it. The server has not been connected to vCenter yet but I still have the same issue. I have tried all the usual things as per commands below, enable SSD and local mode etc.

~ # esxcli storage vflash device list

Name Size Is Local Is Used in vflash Eligibility

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

naa.6c81f660f30b42001b517ba305f0b8ec 190208 true false Other partitions exist

~ # esxcli storage core device list -d naa.6c81f660f30b42001b517ba305f0b8ec

naa.6c81f660f30b42001b517ba305f0b8ec

Display Name: Local DELL Disk (naa.6c81f660f30b42001b517ba305f0b8ec)

Has Settable Display Name: true

Size: 190208

Device Type: Direct-Access

Multipath Plugin: NMP

Devfs Path: /vmfs/devices/disks/naa.6c81f660f30b42001b517ba305f0b8ec

Vendor: DELL

Model: PERC H710P

Revision: 3.13

SCSI Level: 5

Is Pseudo: false

Status: on

Is RDM Capable: false

Is Local: true

Is Removable: false

Is SSD: true

Is Offline: false

Is Perennially Reserved: false

Queue Full Sample Size: 0

Queue Full Threshold: 0

Thin Provisioning Status: unknown

Attached Filters:

VAAI Status: unsupported

Other UIDs: vml.02000000006c81f660f30b42001b517ba305f0b8ec504552432048

Is Local SAS Device: false

Is Boot USB Device: false

No of outstanding IOs with competing worlds: 32

~ # ls /vmfs/devices/disks

mpx.vmhba32:C0:T0:L0 naa.6c81f660f30b42001b517ba305f0b8ec vml.0000000000766d68626133323a303a30:7

mpx.vmhba32:C0:T0:L0:1 naa.6c81f660f30b42001b517ba305f0b8ec:1 vml.0000000000766d68626133323a303a30:8

mpx.vmhba32:C0:T0:L0:5 vml.0000000000766d68626133323a303a30 vml.02000000006c81f660f30b42001b517ba305f0b8ec504552432048

mpx.vmhba32:C0:T0:L0:6 vml.0000000000766d68626133323a303a30:1 vml.02000000006c81f660f30b42001b517ba305f0b8ec504552432048:1

mpx.vmhba32:C0:T0:L0:7 vml.0000000000766d68626133323a303a30:5

mpx.vmhba32:C0:T0:L0:8 vml.0000000000766d68626133323a303a30:6

~ # partedUtil delete /vmfs/devices/disks/naa.6c81f660f30b42001b517ba305f0b8ec 1

Error: Read-only file system during write on /dev/disks/naa.6c81f660f30b42001b517ba305f0b8ec

Unable to delete partition 1 from device /vmfs/devices/disks/naa.6c81f660f30b42001b517ba305f0b8ec

~ # partedUtil getptbl /vmfs/devices/disks/naa.6c81f660f30b42001b517ba305f0b8ec

msdos

24248 255 63 389545984

1 63 8386622 6 0

~ # partedUtil delete "/vmfs/devices/disks/mpx.vmhba32:C0:T0:L0:1" 1

Error: Unable to open /dev/disks/mpx.vmhba32:C0:T0:L0:1 - unrecognised disk label.

Unable to construct disk from device /vmfs/devices/disks/mpx.vmhba32:C0:T0:L0:1

Please help me on how to delete the partition?

Many Thanks!