SSD + filevault2 = slow write speed

[yjchua95]

Yes, but I got an i7 =P

Is yours a dual-core i7 or quad core i7? i7s from 2010 (i.e before Sandy Bridge) don't support the AES-NI chipset.

Can you verify that your MBP is a 2011 model? You may have bought it in 2011, but the MBP itself may be a 2010 model. Sandy Bridge is found in Early-2011 MBPs and late-2011 ones.

Go to  → About This Mac → More Info to check.

 

[dollystereo]

Is a 2011 MBP (early)
intel i7 2600 series quad core proc.

 

[yjchua95]

Is a 2011 MBP (early)
intel i7 2600 series quad core proc.

The early-2011 ones only have i7-2635QM (2.0GHz), i7-2720QM (2.2GHz) or i7-2820QM (2.3GHz).

The i7-2600 is a desktop system. So you've got the wrong processor. Please verify your processor again.

 

[dollystereo]

There is nothing about FV2 that would make it slower over time. It would get a bit slower as soon as you enable FV2, but FV2 would not make it degrade as time passes. You have got something else going on.

Here is something you can try if you want...

Turn off FV2 and wait for it to decrypt. Confirm TRIM is still active then restart in single user mode and type in "fsck -fy" (without the quotes). That will TRIM all unused blocks on the drive and should restore write performance. When finished type reboot.

Now try a speed test before and after FV2 and see what you get.

I on my third Mac using FV2 and it has never degraded speed after the initial small hit.

Hey, I tried to do fsck today, but I can't get to single user boot. I have efi password enabled, so command+s don't boot in the shell.
Finally I disabled efi-pass and did the fsck -fy to recover unused sectors. Got back full speed:

 

[dollystereo]

After enabling FV2 and finished full disk encryption:

 

[Weaselboy]

After enabling FV2 and finished full disk encryption:

Oh good... glad that helped. Almost no difference with FV on too.

 

[dollystereo]

What I think It happened, is that when I upgraded to 10.9.3 I forgot to reactivate TRIM. Then I got a bunch of untrimmed sectors.