 Help With Nand Bad Blocks! |
OESF Forums > Distros, Development, and Model Specific Forums > Model Specific Forums > C1000/3x00 Hardware  |
 Aug 3 2006, 01:41 AM
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#1
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 Group: Members Posts: 172 Joined: 9-November 05 From: Athens-Patras, Greece Member No.: 8,504  |
Guys, I need your help.
I have a C31K which has been working fine up until now. I've flashed it about 5-6 times with different distros. I've been using pdaXrom 1.1.1 beta3. Yesterday I gave beta4 a shot - this one uses a new bootloader, so I had to do some things from a recovery console first. Whenever I erase the nand (flash_eraseall /dev/mtd5) I get 2 errors - it seems there are 2 bad blocks on my NAND chip! :-( Yesterday, when I went into the diagnostics menu (D+M) and did a 'NAND Flash Erase' I got 1 error. Today I got two. What's happening? Is there anything I can do to repair these bad blocks?  I really hope I don't have to ship it to Japan... Thanks in advance! |
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Aug 3 2006, 05:41 AM
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#2
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 Group: Admin Posts: 1,208 Joined: 20-January 06 From: York, Pennsylvania Member No.: 8,961 |
Honestly I dont think Sharp Japan does repairs to bad blocks on the nand...
and if they do... DONT tell them you know there are bad blocks... because technically I dont think anyone should be (in Sharp Mind) in the Recovery Console/Maintance Mode... They may learn that you know to much... and maybe just enough to break the unit... Also tell them that I know on a normal hard disk sometimes bad blocks can be repaired and if they aren't repairable they will because marked as bad and write attempt will avoid those blocks. I dont know how well the Zs are at negotiating between bad and good blocks... Hope you get things worked out or someone gives you a fix for this.. Late |
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Aug 6 2006, 06:41 AM
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#3
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Group: Members Posts: 114 Joined: 12-May 06 Member No.: 9,848 |
QUOTE(InSearchOf @ Aug 3 2006, 05:41 AM) Honestly I dont think Sharp Japan does repairs to bad blocks on the nand... and if they do... DONT tell them you know there are bad blocks... because technically I dont think anyone should be (in Sharp Mind) in the Recovery Console/Maintance Mode... They may learn that you know to much... and maybe just enough to break the unit... Also tell them that I know on a normal hard disk sometimes bad blocks can be repaired and if they aren't repairable they will because marked as bad and write attempt will avoid those blocks. I dont know how well the Zs are at negotiating between bad and good blocks... Hope you get things worked out or someone gives you a fix for this.. Late  I remember someone said that doing a "NAND Flash Full Erase" will mark bad blocks. It should be in the EXTRA MENU in the D+M mode. |
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Aug 17 2006, 07:00 AM
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#4
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Group: Members Posts: 172 Joined: 9-November 05 From: Athens-Patras, Greece Member No.: 8,504 |
Indeed the bad blocks are automatically marked (that's the way NAND works).
What I'm wondering is, will I have a problem in the future? Will more develop? What is the expected read/write lifespan of the Z's NAND? I like to experiment with different ROMs, so I flash my Z every couple of months or so... |
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Aug 17 2006, 08:00 AM
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#5
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Group: Members Posts: 172 Joined: 9-November 05 From: Athens-Patras, Greece Member No.: 8,504 |
Update: After I did a Full NAND FLash Check in the diagnostics menu, and 1 Full Flash erase afterwards, I only get 1 bad block now... wtf!?
Have I actually "fiixed" one of the two bad blocks on my device? |
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Lo-Fi Version | Time is now: 23rd May 2013 - 05:16 AM |