09-24-2011 11:21 AM
1. Should 4096 byte Allocation unit size be used when formatting 3TB + drives?
2. Why do these drives fail SeaTools when connected through the adapter? When you pop the adapter off and directly connect them using a SATA cable, then they do pass SeaTools tests...
As you can see below, the bottom of the external drive has an adapter which has a power connector and a weird cable connector (on the other end of the cable is a regular USB 3.0 connector). This adapter allows the 3 TB drives to work under Windows XP right out of the box:
If you pop that adapter off, you can then connect the drive directly using a SATA cable:
SATA cable can only get in there if its side is chopped off with an exacto knife.:
But if you connect it directly without the adapter, you will get three partitions and things will get messed up as pictured here:
So that's no good ↑ but as soon as you pop the adapter back on, all is well again:
If you mess things up by trying to connect the drive directly instead of through the included adapter, and end up with multiple partitions etc., here's how to fix things:
This must be done under Windows XP. If it is done under Windows 7, then things will work under Windows 7 but will not work under Windows XP, look, there is no drive letter under Windows XP:
So you can only use the drive under Windows XP if you:
1. Put the adapter back on and connect it through the adapter.
2. Go to Windows XP DOS [if Windows Vista/7 DOS is used, then the drive will not be visible under Windows XP.]
• list disk
• select disk #
[of the External Drive]
Right click on My Computer in Windows XP > Manage > Disk Management > Initialize and Convert Disk Wizard will pop up >
Next > Next > Finish
Scroll down to the Disk # of the drive and Right Click on where it says Unallocated > New Partition... >
Next > Next > Next > Next > Next > Finish
[You can assign different drive letter or drive name if you wish before clicking on Next. Quick format will take less than a minute, Long Format will take hours and hours but is recommended initially to make sure there are no problems with the drive.]
I am assuming we should leave the Allocation unit size on Default but I did a quick format under Windows XP then rebooted into Windows 7 where I did a long format under Windows 7 becasue I thought maybe the partition offset would be better than under Windows XP plus I used the 4096 byte Allocation unit size.
P.S. If you don't have My Computer under Windows XP - here's the long way to get to Disk Management:
Windows XP > Control Panel > Administrative Tools > Computer Management > Storage > Disk Management
So my questions are, should 4096 byte Allocation unit size be used when formatting 3TB + drives? and why do Seagate SeatTools diagnostic will fail this drive when it is tested through the adaptor but pass it when it is directly connected without the adaptor?