Re: Repair 4GB SD card
- From: General Schvantzkoph <schvantzkoph@xxxxxxxxx>
- Date: 25 Feb 2007 02:03:55 GMT
On Sun, 25 Feb 2007 01:24:43 +0000, Garry Knight wrote:
I'm not sure if this is the correct group so if it isn't I'd appreciateYou should be able to reformat it with Gparted assuming your card reader
it if someone would suggest a more appropriate one.
As the price was very low, I recently bought a 4 GB SD card with the
name "KeyMem". I wanted to see if it worked with my iPAQ rx1950 Pocket
PC and, if it didn't, I intended to use it in my camera.
So, running Mandriva 2007 Free, I backed up my old 2 GB card then copied
the contents onto the new 4 GB card. The space used on the new card was
just under 2 GB. I then tried to copy (using Midnight Commander) a few
podcasts onto the card which would take the total space used just over 2
GB. It failed on one of the files and asked if I wanted to keep or
delete the partial file. I chose to delete it.
From that point on, the card has been unusable. The Pocket PC acts as if
I haven't put a card in the slot. My camera refuses to even power up
with the card inserted. And while fdisk acts as if it has created a
partition, when it tries to write this partition it fails saying that
the device is in use. Here are the commands I used:
----------------------------------------------------------------------
[root ~]$ fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF
disklabel
Building a new DOS disklabel. Changes will remain in memory only, until
you decide to write them. After that, of course, the previous content
won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by
w(rite)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1023, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-1023, default 1023): Using
default value 1023
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): c
Changed system type of partition 1 to c (W95 FAT32 (LBA))
Command (m for help): v
3529 unallocated sectors
Command (m for help): p
Disk /dev/sdc: 3963 MB, 3963617280 bytes 122 heads, 62 sectors/track,
1023 cylinders Units = cylinders of 7564 * 512 = 3872768 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 1023 3868955 c W95 FAT32 (LBA)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or
resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
WARNING: If you have created or modified any DOS 6.x partitions, please
see the fdisk manual page for additional information.
Error closing file
[root ~]$
----------------------------------------------------------------------
While I've used a lot of flash cards of various kinds, I don't know much
about the technology behind them. For example, I don't know if the
generic USB2.0 card reader/writer I'm using can handle cards of 4 GB in
size, or whether only the newer ones can, or if they all can (I assumed
the latter). Also, it's not obvious whether it's an SD card or an SD-HC
card, though the label on it says "SD card", and I don't know if it
makes a difference which kind it is.
I hope I've given enough information to allow someone to answer the
question: Is this card repairable? And if so, how?
can handle cards > 2G. I'm not sure but I think that not all SD card
readers can handle cards > 2G, I saw something to that effect when
looking at SD card reviews on Newegg.
2G..
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