Messages in this thread |  | | Subject | Re: Journaling pointless with today's hard disks? | Date | Sun, 25 Nov 2001 07:04:33 -0800 (PST) | From | (Barry K. Nathan) |
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> Claiming DC loss to cause hard errors? Design fault. > > IBM would really better shed some real light on this issue, and if they > spoiled their firmware (heck, there ARE firmware updates for OEM disks > of the 75GXP series) or electronics, they'd better admit that so as to > reinstore the trust people had before DTLA drives were sold.
"Power off during write operations may make an incomplete sector which will report hard data error when read. The sector can be recovered by a rewrite operation."
http://www-3.ibm.com/storage/hdd/tech/techlib.nsf/techdocs/85256AB8006A31E587256A77006E0E91/$file/D60gxp_sp21.pdf
Deskstar 60GXP specifications, section 6.0
The above quote and URL are IBM's official word, from their OEM specification manual. FWIW, I checked the OEM manual for the 73LZX as well (not that that drive is available anywhere, but I wanted to see what IBM did/is doing for that drive), and the corresponding section in that manual mentions nothing about incomplete sectors causing hard errors. I just checked the 36LZX OEM spec as well and that also omits the same clause.
OTOH, A few hours ago I checked the specs for several TravelStars and they mentioned this incomplete sector thing. So, I guess IBM's position on this is that this failure mode is OK for IDE drives but not for SCSI.
Here's a starting point for finding the IBM manuals: http://www-3.ibm.com/storage/hdd/tech/techlib.nsf/pages/main?OpenDocument
(Just for my curiosity, I checked for the microdrives too. The phrasing is different there: "There is a possibility that power off during a write operation might make a maximum of 1 sector of data unreadable. This state can be recovered by a rewrite operation.")
-Barry K. Nathan <barryn@pobox.com> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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