I use a 640 GB StoreJet Transcend (0x2329) with ZEVO Community Edition 1.1.1 on OS X 10.8.2.
Is this drive Advanced Format?
I submitted a request for technical support to Transcend but the first response was gibberish so I don't expect a reasonable follow-up.
Models at http://www.transcend-info.com/Products/CatList.asp?LangNo=0&ModNo=293 are similar but different sizes (not 640 GB). Mine is probably 25M2 (TS640GSJ25M2):
Unless I'm missing something, nothing currently in the Transcend support area tells me whether the drive is Advanced Format.
From System Information in OS X 10.8.2:
StoreJet Transcend: Capacity: 640.14 GB (640,135,028,736 bytes) Removable Media: Yes Detachable Drive: Yes BSD Name: disk3 Product ID: 0x2329 Vendor ID: 0x152d (JMicron Technology Corp.) Version: 0.00 Serial Number: 322549FBA004 Speed: Up to 480 Mb/sec Manufacturer: JMicron
History for the ZFS pool shows creation in March 2012 –
macbookpro08-centrim:~ gjp22$ zpool history zhandy | grep create 2012-03-14.17:29:37 zpool create -f -O compression=off -O copies=1 -O casesensitivity=insensitive -O snapdir=visible zhandy /dev/dsk/GPTE_1928482A-7FE4-482D-B692-3EC6B03159BA 2012-06-22.15:51:16 zfs create zhandy/Pocket Time Machine
At that time I almost certainly used ZEVO Setup Assistant to create the pool.
macbookpro08-centrim:~ gjp22$ zpool get ashift zhandy NAME PROPERTY VALUE SOURCE zhandy ashift 0 default
If I discover that the drive is Advanced Format, a different
ashift value will be appropriate.