|Jul 29, 2011, 10:48 AM||#1|
WD Elements EFI partition map problem
I am trying to format a 3TB WD Elements (USB 2) external HD, GUID, 1 Partition Mac Extended Journaled. The formatting goes ok.
If I click on the "3TB WD Ext HDD 1021 Media" on the left in Disk Utility and hit "verify disk", I get the following error message:
"Checking the EFI system partition’s file system
Problems were found with the partition map which might prevent booting
Error: The partition map needs to be repaired because there’s a problem with the EFI system partition’s file system."
A 'repair disk' goes through without hitch, but if I hit 'verify disk' again, I get the same error.
I wonder if I can just disregard this or if I will encounter problems somewhere down the line.
Thank you very much for your help.
|Aug 24, 2011, 03:53 PM||#3|
similar error message with my new 3tb WD elements external hd..
"The partition map needs to be repaired because there’s a problem with the EFI system partition’s file system."
when i hit repair it says it ok but re hitting verify disk prompts the same error message!
just got off the phone with WD, they say that their products are still under testing for mac os lion..
verified the hd using mac leopard. no error whatsoever. if using lion, simply ignore the error message!
17" matte unibody 2.93ghz 7200rpm
Last edited by volcom883; Aug 25, 2011 at 12:48 PM.
|Sep 12, 2011, 02:21 AM||#5|
"problem with the EFI system partition's file system"
Did APPLY and that worked fine. Checked each of the three HDs with FIRST AID/Verify Disk and all looked fine.
Then highlighted 3 TB WD Ext HDD 1021 Media in left panel and tried Verify Disk on that and got the dreaded
The partition map needs to be repaired because there's a problem with the EFI system partition's file system.
message. Did OK then Repair Disk and it reported "The partition map has been repaired" after 10 or 11 lines of checking and "creating new EFI system partition," etc.
Am running LION but am still inclined to worry these HD partitions will not be safe to use (for backups--CCC clone, Super Duper Clone, Time Machine).
Anyone find any further detail or color on this problem? I've put a note on the Apple support forum (iMac) but get no responses.
|Nov 22, 2011, 05:26 AM||#7|
"The partition map needs to be repaired because there’s a problem with the EFI system
"The partition map needs to be repaired because there’s a problem with the EFI system partition’s file system.”
It repairs ‘ok’ but get the same error message when verifying again.
As this thread has been running for 4 months or so and its still a problem!.... Has anyone had problems using their ‘drives’ while ignoring the error message?
I feel very uneasy trusting the drive as a reliable backup!
|Nov 23, 2011, 03:48 AM||#8|
Trying to find a fix as it is definately not behaving.
I store video on the drive and if I try to play anything it takes literally minutes to load and even fails quite regularly.
If anyone has any fix I would be grateful to hear.
|Feb 12, 2012, 11:51 AM||#10|
27" Thunderbolt display
2012 rMBP base
2011 13" MBA base
|Feb 12, 2012, 12:02 PM||#11|
And it's HDD, not HD, that stands for High Definition.
Spoiler Free since 2007 11" MBA 2GHz i7 8GB RAM, 17" MBP 2.66GHz i7 SSD + 1TB HDD Antiglare 8GB RAM, 2.8GHz C2D 15" MBP, iPhone 5 64GB, Dual 2.3GHz G5 Stay Hungry. Stay Foolish.
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