SSD not available for VMware vSphere Flash Read Cache
First, in order to detect Network Address Authority (naa) identifier of the SSD run de following commands:
# esxcli storage nmp device list|less
or
# esxcfg-scsidevs -l | less
or
#esxcli storage core device list|less
If you detect the following
Is SSD: false <– Not recognized as SSD
Run these commands:
# esxcli storage nmp satp rule add –satp=VMW_SATP_LOCAL –device naa.600304801axxxx –option “enable_local enable_ssd”
# esxcli storage core claimrule load
# esxcli storage core claiming reclaim -d naa.XXXXXXX
# esxcli storage core claimrule run
And try again.
IF YOU ALREADY HAVE SSD USED WITH OTHER PROPOSAL AND YOU NEED REUSE FOR FLASH CACHE
The first step is destroy the vmfs partition
# esxcli storage vflash device list
Name Size Is Local Is Used in vflash Eligibility
———————————— —— ——– —————– ——————————-
naa.600304801a3345001e318eab0de2435d 227928 true false No, there are other filesystems
naa.600304801a3345001e318e750aa08627 227928 true false No, there are other filesystems
Second, discover the partintion number
# partedUtil getptbl /vmfs/devices/disks/naa.600304801a3345001e318eab0de2435d
gpt
29056 255 63 466796544
1 2048 466784639 AA31E02A400F11DB9590000C2911D1B8 vmfs 0
In this case 1
# partedUtil delete /vmfs/devices/disks/naa.600304801a3345001e318eab0de2435d 1
# esxcli storage core claimrule load
# esxcli storage core claiming reclaim -d naa.600304801a3345001e318eab0de2435d
# esxcli storage core claimrule run
And that’s it.
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