MBR or not in SD cards?
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From: Silvar Beitel on 9 Jul 2008 14:23 Most formatted SD cards I have examined have a master boot record in sector zero which points to one or more partition/volume records that contain everything you need to know about how the partition/volume is set up. IOW, they're set up like hard drives. However, I found one card (a Dane-Elec 128 MB) that has no MBR - the (only) partition/ volume boot record is in sector zero, like floppy disks. I suspect there are others sold this way. Is there such a thing as a "simple" "standard" way to identify the difference by examining the contents of the card? -- Silvar Beitel
From: Silvar Beitel on 9 Jul 2008 15:51 On Jul 9, 2:23 pm, I wrote: <request for info on how to easily identify SD cards that have MBRs from those that don't> and 3 hours earlier I wrote: <the same request, more or less> Sorry for the duplication. The first post didn't show up in the elapsed 3 hours, so I posted it again, only to have the first one show up a few minutes later. I hate Google Groups. A few months ago, my friendly local ISP dropped their NNTP server, so I have been trying GG to access USENET. It's time to pay a few bucks for "real" access again, especially since a number of folks have GG submissions blocked (for good reason!) Sheesh. -- Silvar Beitel
From: John Speth on 9 Jul 2008 18:03 > The first post didn't show up in the elapsed 3 hours, so I posted it > again, only to have the first one show up a few minutes later. I hate > Google Groups. A few months ago, my friendly local ISP dropped their > NNTP server, so I have been trying GG to access USENET. It's time to > pay a few bucks for "real" access again, especially since a number of > folks have GG submissions blocked (for good reason!) I think google groups sucks too. I recommend using "nntp.aioe.org" instead. It's free and the spam repellent policy is very effective. You can post too. The downside is the retention capacity is tiny compared to for-pay NG servers. JJS
From: CBFalconer on 9 Jul 2008 18:37 Silvar Beitel wrote: > On Jul 9, 2:23 pm, I wrote: > > <request for info on how to easily identify SD cards that have > MBRs from those that don't> and 3 hours earlier I wrote: > <the same request, more or less> Sorry for the duplication. > > The first post didn't show up in the elapsed 3 hours, so I posted > it again, only to have the first one show up a few minutes later. > I hate Google Groups. A few months ago, my friendly local ISP > dropped their NNTP server, so I have been trying GG to access > USENET. It's time to pay a few bucks for "real" access again, > especially since a number of folks have GG submissions blocked > (for good reason!) Some free news servers. I use motzarella, teranews and gmane. <http://www.teranews.com> (1 time charge) (free) <http://news.aioe.org> (free) <http://dotsrc.org> (free) <http://www.x-privat.org/international.php> (free) <http://motzarella.org/?language=en> (free) <http://gmane.org/> (mail-lists via news) (free) <http://www.newsfeeds.com/signup.htm> (pay) <http://www.individual.net/ (low pay) -- [mail]: Chuck F (cbfalconer at maineline dot net) [page]: <http://cbfalconer.home.att.net> Try the download section.
From: Stefan Reuther on 10 Jul 2008 13:20
Silvar Beitel wrote: > Most formatted SD cards I have examined have a master boot record in > sector zero which points to one or more partition/volume records that > contain everything you need to know about how the partition/volume is > set up. IOW, they're set up like hard drives. However, I found one > card (a Dane-Elec 128 MB) that has no MBR - the (only) partition/ > volume boot record is in sector zero, like floppy disks. I suspect > there are others sold this way. > > Is there such a thing as a "simple" "standard" way to identify the > difference by examining the contents of the card? You read the CSD register of the card. It tells you whether the card is to be formatted as "superfloppy" or "hard disk". SD 2.0 requires all cards to be formatted as hard-disk with a FAT partition, so I'd expect new cards all to be in this format. Stefan |