The drive could spin up but could not be identified and the system files could not be backed up. The terminal continuously displayed an error message. The engineer managed to enter the diagnostic program mode and back up the system files. Clearing lists, initializing identification, and regenerating the translator addressed the identification and error issues. Fixing a common firmware issue then allowed a full scan of the drive with all functions working properly.

1. ST1000DM003- 9YN162 Data Recovery Case Study
This is one of success case done by DFL engineer in Korea yesterday. The user mentioned that the
patient drive can spin up. But cannot get ID information, cannot back up sys file either. In the
meanwhile, The terminal keep showing MCMainPORT failed error message.
HDD ID
Patient drive: ST1000DM003- 9YN162
PCB Number: 100664987
Capacity:1TB FW: CC4B
Reported symptoms
Cannot IDed, unable to backup SYS file, terminal error message keeps circulating.
Solution
Following steps were performed for this case:
1. Managed to enter F3 T> once power on the program. Since MCMainPORT failed error message
keeps circulating under terminal, it prevents the program to enter F3 T>. We have to press CTRL
+Z to enter it once power applied.
2. Tried to back up the important sys file via “Edit sys” function. Sometimes “Read sys” function
may not work for some busy cases or IDed failed cases, then pls try to use “Edit sys” feature.
3. Check G list and cleared G list by input related command.
4. Check NG list.
5. Initialize ID and un-tick Media cache.
6. Regenerate translator. At this moment, we can see ID, no MCMainPORT failed error message
again, but we are still unable to see module list and the DWF status was light on.
7. Fix DWF common issue by just one click, then exit and re-enter the program.
8. The whole drive can be scanned properly.
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