H207780: Data corruption exposure with 3.5-inch 300, 450, 600 GB SAS and FC HDDs - IBM Servers
RETAIN tip: H207780
A subset of disk drive modules (DDMs) may have an exposure to data loss under a unique set of circumstances during a proximal write, a feature which does a skip operation on the data transfer from Dynamic Random Access Memory (DRAM) to disk to improve performance.
The exposure to data loss requires that the starting Logical Block Address (LBA) is a reassigned LBA.
The affected drives and firmware levels are as follows:
This issue has not been reported by any IBM System Storage DS3500 or 4000 or 5000 Storage Controller users.
The system may be any of the following IBM servers:
The system is configured with one or more of the following IBM Options:
This tip is not software specific.
The A3C0, JH00, and JH01 firmware for the hard disk drives is affected.
The fix for this issue is contained in the following releases:
These files are available on the IBM Storage support web site.
The files are available by selecting the appropriate Product Group, type of System, Product name, Product machine type, and Operating system on IBM Support's Fix Central web page, at the following URL:
The firmware levels listed in the Fix must be installed in order to remove completely the possibility of encountering this issue.
If the first LBA of a proximal write (caused by two writes that are close to each other sequentially and sent to the drive in close proximity from a time perspective) is a reassigned LBA, an invalid skip mask is used. This creates the possibility that the correct data is not written to the disk.
Applicable countries and regions
Document id: MIGR-5092732