From: asufi <as...@sa...> - 2010-01-26 16:42:17
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Hi I have an image built and working fairly well on the Overo fire. I wish to make copies of my 8GB microSD card using 4GB cards. Can I just follow conventional methods or is there something special I need to do? Thanks. -- View this message in context: http://old.nabble.com/making-copies-of-microSD-cards-tp27325731p27325731.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Dave H. <dhy...@gm...> - 2010-01-26 18:14:41
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Hi, > I have an image built and working fairly well on the Overo fire. I wish to > make copies of my 8GB microSD card using 4GB cards. > Can I just follow conventional methods or is there something special I need > to do? I'm not sure why you would want to take the data from one 8 Gb card and put it onto 2 4 Gb cards, unless you're sending the 4Gb cards to somebody else to reconstruct. You should be able to put the 8Gb card into you PC, and use the dd command to read the entire 8Gb card into a file on disk. You should then be able to use dd to write the first half of the image onto one 4Gb card and again to write the second half of the image onto another 4Gb card. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ |
From: asufi <as...@sa...> - 2010-01-26 18:35:21
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I have less than 1GB data in there and do not need the 8GB space. Hence, I would like to cut the card size down to 4GB. There are these partitions on there for u-book MLO etc. and then the gumstix omap3 image itself. Dave Hylands wrote: > > Hi, > >> I have an image built and working fairly well on the Overo fire. I wish >> to >> make copies of my 8GB microSD card using 4GB cards. >> Can I just follow conventional methods or is there something special I >> need >> to do? > > I'm not sure why you would want to take the data from one 8 Gb card > and put it onto 2 4 Gb cards, unless you're sending the 4Gb cards to > somebody else to reconstruct. > > You should be able to put the 8Gb card into you PC, and use the dd > command to read the entire 8Gb card into a file on disk. > > You should then be able to use dd to write the first half of the image > onto one 4Gb card and again to write the second half of the image onto > another 4Gb card. > > -- > Dave Hylands > Shuswap, BC, Canada > http://www.DaveHylands.com/ > > ------------------------------------------------------------------------------ > The Planet: dedicated and managed hosting, cloud storage, colocation > Stay online with enterprise data centers and the best network in the > business > Choose flexible plans and management services without long-term contracts > Personal 24x7 support from experience hosting pros just a phone call away. > http://p.sf.net/sfu/theplanet-com > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > -- View this message in context: http://old.nabble.com/making-copies-of-microSD-cards-tp27325731p27327501.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Jason C. M. <jas...@am...> - 2010-01-26 18:23:30
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I think he wants the 4GB cards to be just like the 8GB with exception of just having a smaller EXT2/EXT3 file system. This would be possible if he was careful when he created the partition or if he knew how to resize it. If you want to copy an image from card to card its best to make it just slightly smaller than the smallest card. -----Original Message----- From: Dave Hylands [mailto:dhy...@gm...] Sent: Tuesday, January 26, 2010 10:14 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] making copies of microSD cards Hi, > I have an image built and working fairly well on the Overo fire. I wish to > make copies of my 8GB microSD card using 4GB cards. > Can I just follow conventional methods or is there something special I need > to do? I'm not sure why you would want to take the data from one 8 Gb card and put it onto 2 4 Gb cards, unless you're sending the 4Gb cards to somebody else to reconstruct. You should be able to put the 8Gb card into you PC, and use the dd command to read the entire 8Gb card into a file on disk. You should then be able to use dd to write the first half of the image onto one 4Gb card and again to write the second half of the image onto another 4Gb card. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Sufi, A. <asufi@Sarnoff.com> - 2010-01-26 18:36:37
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That's exactly what I want to do... -----Original Message----- From: Jason C. Mecham [mailto:jas...@am...] Sent: Tuesday, January 26, 2010 1:23 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] making copies of microSD cards I think he wants the 4GB cards to be just like the 8GB with exception of just having a smaller EXT2/EXT3 file system. This would be possible if he was careful when he created the partition or if he knew how to resize it. If you want to copy an image from card to card its best to make it just slightly smaller than the smallest card. -----Original Message----- From: Dave Hylands [mailto:dhy...@gm...] Sent: Tuesday, January 26, 2010 10:14 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] making copies of microSD cards Hi, > I have an image built and working fairly well on the Overo fire. I wish to > make copies of my 8GB microSD card using 4GB cards. > Can I just follow conventional methods or is there something special I need > to do? I'm not sure why you would want to take the data from one 8 Gb card and put it onto 2 4 Gb cards, unless you're sending the 4Gb cards to somebody else to reconstruct. You should be able to put the 8Gb card into you PC, and use the dd command to read the entire 8Gb card into a file on disk. You should then be able to use dd to write the first half of the image onto one 4Gb card and again to write the second half of the image onto another 4Gb card. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Dave H. <dhy...@gm...> - 2010-01-26 18:36:36
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Hi, On Tue, Jan 26, 2010 at 10:23 AM, Jason C. Mecham <jas...@am...> wrote: > I think he wants the 4GB cards to be just like the 8GB with exception of just having a smaller EXT2/EXT3 file system. > > This would be possible if he was careful when he created the partition or if he knew how to resize it. > > If you want to copy an image from card to card its best to make it just slightly smaller than the smallest card. You should be able to use gparted on the linux host machine to resize the 8 Gb partition down, and then use dd to copy the first 4Gb of the 8 Gb card. Although it would probably be way faster to do a file copy of the files off the 8Gb card into a directory on the host, format a 4Gb card properly, and then copy everything back. I'd probably use tar to do the copy (since it preserves all of the ownerships and permissions etc. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ |
From: Alex G. <al...@al...> - 2010-01-27 03:49:15
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On 27/01/2010 3:42 AM, asufi wrote: > Hi > > I have an image built and working fairly well on the Overo fire. I wish to > make copies of my 8GB microSD card using 4GB cards. > Can I just follow conventional methods or is there something special I need > to do? > > Thanks. > > Use dd. eg One card mounted as /dev/sdb1 and sdb2 other cards as sdc1 and sdc2 then dd if=/dev/sdc of=/dev/sdd Just did this for 15 microsd cards. You could change the block size it uses . Alex -- UTS CRICOS Provider Code: 00099F DISCLAIMER: This email message and any accompanying attachments may contain confidential information. If you are not the intended recipient, do not read, use, disseminate, distribute or copy this message or attachments. If you have received this message in error, please notify the sender immediately and delete this message. Any views expressed in this message are those of the individual sender, except where the sender expressly, and with authority, states them to be the views the University of Technology, Sydney. Before opening any attachments, please check them for viruses and defects. |
From: Dave H. <dhy...@gm...> - 2010-01-27 06:36:46
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Hi Alex, On Tue, Jan 26, 2010 at 7:49 PM, Alex Gibson <al...@al...> wrote: > On 27/01/2010 3:42 AM, asufi wrote: >> Hi >> >> I have an image built and working fairly well on the Overo fire. I wish to >> make copies of my 8GB microSD card using 4GB cards. >> Can I just follow conventional methods or is there something special I need >> to do? >> >> Thanks. >> >> > Use dd. > > eg One card mounted as /dev/sdb1 and sdb2 other cards as sdc1 and sdc2 > > then > > dd if=/dev/sdc of=/dev/sdd > > Just did this for 15 microsd cards. That will definitely work if the partitions are the same size. If the source is bigger than the destination, then you may wind up losing data. It won't necessarily work if they're different sizes. I found using a block size of 1M or more cranks up the performance on USB connected hard drives (30 MB/sec with 1M block size versus 3 Mb/sec for the default). I haven't measured with SD cards. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ |
From: Alex G. <al...@al...> - 2010-01-27 23:28:07
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On 27/01/2010 5:36 PM, Dave Hylands wrote: > Hi Alex, > > On Tue, Jan 26, 2010 at 7:49 PM, Alex Gibson<al...@al...> wrote: > >> On 27/01/2010 3:42 AM, asufi wrote: >> >>> Hi >>> >>> I have an image built and working fairly well on the Overo fire. I wish to >>> make copies of my 8GB microSD card using 4GB cards. >>> Can I just follow conventional methods or is there something special I need >>> to do? >>> >>> Thanks. >>> >>> >>> >> Use dd. >> >> eg One card mounted as /dev/sdb1 and sdb2 other cards as sdc1 and sdc2 >> >> then >> >> dd if=/dev/sdc of=/dev/sdd >> >> Just did this for 15 microsd cards. >> > That will definitely work if the partitions are the same size. If the > source is bigger than the destination, then you may wind up losing > data. > > It won't necessarily work if they're different sizes. > > I found using a block size of 1M or more cranks up the performance on > USB connected hard drives (30 MB/sec with 1M block size versus 3 > Mb/sec for the default). I haven't measured with SD cards. > > I've copied smaller to larger cards ,mostly works , sometimes doesn't seems to depend on distro. More success with fedora. Not all copies work even wirth using the same sized cards. Maybe 1 in 4 gets a kernal panic on boot. Usually can't find initial console. Alex -- UTS CRICOS Provider Code: 00099F DISCLAIMER: This email message and any accompanying attachments may contain confidential information. If you are not the intended recipient, do not read, use, disseminate, distribute or copy this message or attachments. If you have received this message in error, please notify the sender immediately and delete this message. Any views expressed in this message are those of the individual sender, except where the sender expressly, and with authority, states them to be the views the University of Technology, Sydney. Before opening any attachments, please check them for viruses and defects. |
From: <cod...@gm...> - 2010-03-31 11:03:17
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Just thought I'd add my $0.02 here regarding imaging a large disk to a smaller disk. I've had some luck in the past with resize2fs. You can use that to shrink a filesystem that exists in a partition. Then use fdisk (or other partitioning tool like qparted) to shrink the partition itself. Make sure you do not shrink the partition so small that it truncates the shrunken filesystem. If you can get the filesystem and partition small enough to fit on the new drive, then the dd if=/path/to/old/disk of=/path/to/new/disk bs=1M should work. I haven't tried this specifically with MicroSD cards, but I've had some luck with it with imaging a 750GB SATA drive onto a 300GB one. Perhaps it's something to try, on a test card of course. :) On Wed, Jan 27, 2010 at 6:27 PM, Alex Gibson <al...@al...> wrote: > On 27/01/2010 5:36 PM, Dave Hylands wrote: > > Hi Alex, > > > > On Tue, Jan 26, 2010 at 7:49 PM, Alex Gibson<al...@al...> > wrote: > > > >> On 27/01/2010 3:42 AM, asufi wrote: > >> > >>> Hi > >>> > >>> I have an image built and working fairly well on the Overo fire. I wish > to > >>> make copies of my 8GB microSD card using 4GB cards. > >>> Can I just follow conventional methods or is there something special I > need > >>> to do? > >>> > >>> Thanks. > >>> > >>> > >>> > >> Use dd. > >> > >> eg One card mounted as /dev/sdb1 and sdb2 other cards as sdc1 and sdc2 > >> > >> then > >> > >> dd if=/dev/sdc of=/dev/sdd > >> > >> Just did this for 15 microsd cards. > >> > > That will definitely work if the partitions are the same size. If the > > source is bigger than the destination, then you may wind up losing > > data. > > > > It won't necessarily work if they're different sizes. > > > > I found using a block size of 1M or more cranks up the performance on > > USB connected hard drives (30 MB/sec with 1M block size versus 3 > > Mb/sec for the default). I haven't measured with SD cards. > > > > > > I've copied smaller to larger cards ,mostly works , sometimes doesn't > seems to depend on distro. More success with fedora. > > Not all copies work even wirth using the same sized cards. Maybe 1 in 4 > gets a kernal panic on boot. > Usually can't find initial console. > > > Alex > > -- > UTS CRICOS Provider Code: 00099F > DISCLAIMER: This email message and any accompanying attachments may contain > confidential information. If you are not the intended recipient, do not > read, use, disseminate, distribute or copy this message or attachments. If > you have received this message in error, please notify the sender > immediately and delete this message. Any views expressed in this message > are those of the individual sender, except where the sender expressly, and > with authority, states them to be the views the University of Technology, > Sydney. Before opening any attachments, please check them for viruses and > defects. > > > ------------------------------------------------------------------------------ > The Planet: dedicated and managed hosting, cloud storage, colocation > Stay online with enterprise data centers and the best network in the > business > Choose flexible plans and management services without long-term contracts > Personal 24x7 support from experience hosting pros just a phone call away. > http://p.sf.net/sfu/theplanet-com > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |