ZTISelectBootDisk.wsf new with BusType

Several years ago I wrote a script to help select which disk to deploy Windows to during your MDT LiteTouch or ZeroTouch task sequence.

https://keithga.wordpress.com/2013/09/18/ztiselectbootdisk-wsf/

Well, based on a request from my latest client, I have created a similar script that support BusType.

BackGround

My client is trying to install Windows Server 2016 on a Server with a SAN. When the machine boots to WinPE, one of the SAN drives appears *first* as Disk 0 (Zero). By default MDT Task Sequences will deploy to Disk Zero! My ZTISelectBootDisk.wsf already shows how to override. All we need to do is to find a way to tell MDT which disk to choose based on the correct WMI query.

Turns out it was harder than I thought.

What we wanted was the BusType that appears in the “Type” field when you type “Select Disk X” and then “detail disk” in Diskpart.exe.  When we ran “Detail Disk” in DIskpart.exe we could see the bus type: Fibre as compared to regular disks like SCSI or SAS.

The challenge was that the regular Win32_diskDrive WMI query wasn’t returning the BusType value, and we couldn’t figure out how to get that data through other queries.

I tried running some PowerShell queries like ‘Get-Disk’ and noticed that the output type was MSFT_Disk, from a weird WMI Namespace: root\microsoft\windows\storage. But adding that query to the script works! Yea!!!

BusType

What kind of BusTypes are there?

Name Value Meaning
Unknown 0 The bus type is unknown.
SCSI 1 SCSI
ATAPI 2 ATAPI
ATA 3 ATA
1394 4 IEEE 1394
SSA 5 SSA
Fibre Channel 6 Fibre Channel
USB 7 USB
RAID 8 RAID
iSCSI 9 iSCSI
SAS 10 Serial Attached SCSI (SAS)
SATA 11 Serial ATA (SATA)
SD 12 Secure Digital (SD)
MMC 13 Multimedia Card (MMC)
Virtual 14 This value is reserved for system use.
File Backed Virtual  15 File-Backed Virtual
Storage Spaces  16 Storage spaces
NVMe 17 NVMe

For this script we are *excluding* the following devices:

Name Value Meaning
Fibre Channel 6 Fibre Channel
iSCSI 9 iSCSI
Storage Spaces  16 Storage spaces
NVMe 17 NVMe

Meaning that the *FIRST* fixed device not in this list will become the new *Target* OS Disk. Run this query on your machine to see what disk will become the target:

gwmi -namespace root\microsoft\windows\storage -query 'select Number,Size,BusType,Model from MSFT_Disk where BusType <> 6 and BusTy
pe <> 9 and BusType <> 16 and BusType <> 17' | Select -first 1

Requirements

Reminder that this script requires MDT (latest), and the script should be placed in the %DeploymentShare%\Scripts folder. Additionally you should install all the Storage packages for WinPE, sorry I don’t recall *which* packages I selected when I did testing.

Script

-k

 

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s