Hi All,
I have a question to ask regarding the creation of diskgroups. My hosts contain 2 cache ssd's and 6 capacity ssd's to create 2 diskgroups. When doing the one button claim disks in the GUI is there any standard selection of disks calculated or is it random?
The reason I ask is I’ve scripted the creation of 2 disk groups just using basic math of getting all disks filtering out the 2 cache and 6 capacity disks by vendor (will filter on CapacityGB as well later), then sorting the objects by CanonicalName, selecting the first cache disk and first 3 capacity disks for the first diskgroup and then selecting last cache disk and last 3 capacity disks for the second diskgroup. My thinking was because it was one controller and VSAN being a distributed file system this would be ok. I also checked canonical and runtime names of existing nodes built via the GUI and there doesn’t seem to be a pattern of disks selected on a per diskgroup basis, I have tested it and seems to work with no errors but I just want to clarify?
foreach ($vmhost in $vmhosts){
if((Get-VsanDiskGroup -VMHost $vmhost) -eq $null) {
$luns = $vmhost | Get-ScsiLun | select CanonicalName, CapacityGB, Vendor
$Cache = $luns | ? {$_.vendor -eq "HGST"}
$Capacity = $luns | ? {$_.vendor -eq "SAMSUNG"}
$vsanCacheDisk = $Cache | Sort-Object CanonicalName | Select-Object -first 1 | select CanonicalName
$vsanCapacityDisk = $Capacity | Sort-Object CanonicalName | Select-Object -first ($Capacity.Count /2) | select CanonicalName
New-VsanDiskGroup -VMHost $vmhost -SsdCanonicalName $vsanCacheDisk.CanonicalName -DataDiskCanonicalName $vsanCapacityDisk.CanonicalName -RunAsync
$vsanCacheDisk = $Cache | Sort-Object CanonicalName | Select-Object -last 1 | select CanonicalName
$vsanCapacityDisk = $Capacity | Sort-Object CanonicalName | Select-Object -last ($Capacity.Count /2) | select CanonicalName
New-VsanDiskGroup -VMHost $vmhost -SsdCanonicalName $vsanCacheDisk.CanonicalName -DataDiskCanonicalName $vsanCapacityDisk.CanonicalName -RunAsync
}
}
lamwVMware PowerCLI
Nicholas
