How to see how much cache HDD is registering

[aaronw1986]

I just got my new Mac Pro!!! I'm about to format a 1TB drive. How do I check if it's registering as having 32MB of cache?

 

[Jonny427]

Apple icon > about this computer > more info > click on Storage

 

[aaronw1986]

Intel ESB2 AHCI:

Vendor: Intel
Product: ESB2 AHCI
Speed: 3.0 Gigabit
Description: AHCI Version 1.10 Supported

ST31000340AS:

Capacity: 931.51 GB
Model: ST31000340AS
Revision: SD04
Serial Number: 3QJ01HRB
Native Command Queuing: Yes
Queue Depth: 32
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Bay Name: "Bay 1"
Mac OS 9 Drivers: No
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified
Volumes:
1TB:
Capacity: 931.19 GB
Available: 910.68 GB
Writable: Yes
File System: Journaled HFS+
BSD Name: disk0s2
Mount Point: /

Doesn't tell me about the cache.

 

[jabrowntx]

Doesn't tell me about the cache.

Google the model number of your drive - http://www.seagate.com/ww/v/index.j...e7f43110VgnVCM100000f5ee0a0aRCRD&locale=en-US

32Mb

 

[aaronw1986]

Google the model number of your drive - http://www.seagate.com/ww/v/index.j...e7f43110VgnVCM100000f5ee0a0aRCRD&locale=en-US

32Mb

I know it is a 32MB cache drive. The question is if it's really running at 32, as there seem to be some firmware issues lately.

 

[Jonny427]

Isn't the "Queue Depth: 32" the indicator of a 32mb cache? Or am I wrong?

 

[tyr2]

Queue Depth is the number of commands that can be on the queue at any one time, to be scheduled with NCQ (Native Command Queuing). It's not related to the cache.

How you tell how much cache is detected I have no idea. The cache isn't exposed to the operating system anyway is it?