Re: different number of reserved sectors on FAT16 formatted sd micro card
On Sat, 31 May 2008 04:50:02 -0700 (PDT), jsahambi@iitg.ernet.in put
finger to keyboard and composed:
>We have formatted a sd micro card with a single partition under FAT16
>on 2 different pc's having
>
>windows XP (with service pack 2). After the format is complete, if we
>read the card with a Sector
>
>Edit software, the boot sector on the card shows reserved sectors as
>'01' in case of card formatted
>
>by PC 1, and shows '02' in case of card formatted PC 2. Why is this
>different?
>
>Microsoft says that the number of reserved sectors as indicated in
>boot sector are 'usually one'!
I can't offer an explanation, but my old hard drive was formatted
under FAT32 and had a non-standard number of reserved sectors (36,
IIRC) when the default should have been 32. The two logical FAT32
volumes in my present configuration both have 32 reserved sectors. I
first noticed there was a "problem" when an old version of Seagate's
SeaTools complained of an obscure file system error. Otherwise the
machine functioned perfectly.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Re: different number of reserved sectors on FAT16 formatted sd micro card
On Sat, 31 May 2008 04:50:02 -0700 (PDT), jsahambi@iitg.ernet.in put
finger to keyboard and composed:
>We have formatted a sd micro card with a single partition under FAT16
>on 2 different pc's having
>
>windows XP (with service pack 2). After the format is complete, if we
>read the card with a Sector
>
>Edit software, the boot sector on the card shows reserved sectors as
>'01' in case of card formatted
>
>by PC 1, and shows '02' in case of card formatted PC 2. Why is this
>different?
>
>Microsoft says that the number of reserved sectors as indicated in
>boot sector are 'usually one'!
What's in the second sector? Is it empty? Did you perform a "full" or
"quick" format? If you selected a quick format, would this have
overwritten the entire boot sector or would it have left the BPB
intact? I suspect the latter, in which case you would be left with the
manufacturer's original BPB. Perhaps the manufacturer of the flash
drive allowed for a backup or security sector at sector 2 ??? For
example, FAT32 file systems usually have a backup boot sector at
sector 6 within the reserved area.
Not long ago I installed Windows XP on a FAT32 partition that had
originally been formatted under Windows 98SE. Afterwards I checked
sector 6 in the reserved area and found that it still contained a
Win98SE backup boot sector, ie it had not been updated with XP code as
had the primary boot sector. BTW, if you ever do the above, do not use
the FIXBOOT command from the Win XP Recovery Console. You *will* trash
your file system.
Re: different number of reserved sectors on FAT16 formatted sd micro card
Franc Zabkar wrote in news:8f5944tipqf4v8hnm7mus05qg95ro1i9ja@4ax.com
> On Sat, 31 May 2008 04:50:02 -0700 (PDT), jsahambi@iitg.ernet.in put
> finger to keyboard and composed:
>
> > We have formatted a sd micro card with a single partition under FAT16
> > on 2 different pc's having windows XP (with service pack 2).
> > After the format is complete, if we read the card with a Sector
> > Edit software, the boot sector on the card shows reserved sectors as
> > '01' in case of card formatted by PC 1, and shows '02' in case of card
> > formatted PC 2. Why is this different?
> >
> > Microsoft says that the number of reserved sectors as indicated in
> > boot sector are 'usually one'!
>
> What's in the second sector? Is it empty? Did you perform a "full" or
> "quick" format? If you selected a quick format, would this have
> overwritten the entire boot sector or would it have left the BPB
> intact? I suspect the latter, in which case you would be left with the
> manufacturer's original BPB. Perhaps the manufacturer of the flash
> drive allowed for a backup or security sector at sector 2 ??? For
> example, FAT32 file systems usually have a backup boot sector at
> sector 6 within the reserved area.
Franc, what part of
"We have formatted *a* sd micro card with a single partition under
FAT16 on 2 different pc's having windows XP (with service pack 2). "
different number of reserved sectors on FAT16 formatted sd micro card 
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