iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 72
2010-09-09
11. If restore from Install DVD is
unsuccessful, startup a known-
good Intel Mac system with
T key pressed (to enter Target
Disk Mode), insert the iMac
Install DVD in its optical drive
and connect it to the user’s
system via a FireWire cable.
Startup user’s system while
holding Option key, then select
and boot from the Install
Disc DVD and restore system
software. Verify if software
restore was successful.
Yes Restore failure seems to be
due to customer’s internal
optical drive or media issue.
Go to Optical Drive Read/
Write Error symptom ow.
No Restore failure seems to be
due to internal SATA bus
issue. Replace logic board.
M19
Hard Drive Read/Write Errors
Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone
Quick Check
Symptoms Quick Check
Drive Read/Write Error
Drive Bad Sector/Defective
Drive Formatting Issues
• Cannot save documents
• Read/write error message
• Hang when accessing or saving
data
1. Boot from Install DVD. Use Disk Utility to verify
S.M.A.R.T. status of internal drive(s).
2. Use Disk Utility to repair disk.(s)
3. Verify that user’s data is backed up and that user
authorizes erasing disk and reinstalling software.
4. Use Target Disk Mode to mount user’s drive(s) on
a known-good computer. Use Disk Utility on host
computer for Quick Checks 2 through 3.
Deep Dive
Check Result Action Code
1. Run Disk Utility ‘Repair Disk’
function, and verify if it
completes successfully.
Yes Go to step 2.
No Go to step 3.
2. Reboot computer. Verify if
system boots successfully and
that Disk Utility “Verify” function
reports no errors.
Yes Data error. Issue resolved. H07
No Go to step 3.