Re: [CentOS] CentOS 8 on USB disk
On 1/29/20 12:34 PM, Jerry Geis wrote: Sorry for the noise... My machine must not be working. I copied the iso to another machine, did the same command as always and worked just fine. not sure what is up with my normal box. Has always worked before. [problem with my subscription, sorry if this is a duplicate.] Just a suggestion - look for "large" files in /dev/ on your old machine. An incorrect output file name will leave a big file there, rather than write to the device you intended. Something like: find /dev -size +1G -ls I use the dd option 'oflag=direct' to do direct I/O on the output. Eliminates the need for sync. Coupled with 'status=progress' you can get a real indication of how fast your storage device is. dd bs=4M oflag=direct status=progress if=some.iso of=/dev/sdX ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 8 on USB disk
I'd be a bit careful with that one Joakim. If dd throws an error for any reason the sync will not run and your USB may be in a partially written state for some time. Since it is not mounted, there is no umount command to sync for you. If you pull the stick out shortly after the dd command was run you will have a partially written USB - nasty. I'd suggest "dd if=iso of=usbdevice status=progress ; sync", though personally I'm a bit old school and manually do a "sync ; sync" before removing raw devices. On 30/01/2020 06:37, Joakim Dellrud wrote: I usually use the command "dd if=iso of=usbdevice status=progress && sync" On Wed, 29 Jan 2020, 18:36 Erick Perez - Quadrian Enterprises, < epe...@quadrianweb.com> wrote: That happened to me several times My USB was "burned" and never displayed new data copied to it. By "burned" I mean the flash drive was faulty up to a point where it always showed a phantom image of what WAS in the pen drive. But YMMV On Wed, Jan 29, 2020, 11:56 AM J Martin Rushton via CentOS < centos@centos.org> wrote: What's your dd command? Are you sure you are writing to the raw disk and not inside a partition? On 29/01/2020 16:30, Jerry Geis wrote: Well after a closer look - Seems like the OLD 8.0 iso image is still on the USB. Not the new 8.1 I have tried to redo the dd command to copy the 8.1 iso - I get no errors - but it still comes up with the 8.0 I then tried to remove the partitions, save and recopy. still same old boot menu. Is there a trick to write over the UEFI stuff ? Jerry ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- J Martin Rushton MBCS ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- J Martin Rushton MBCS ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 8 on USB disk
I usually use the command "dd if=iso of=usbdevice status=progress && sync" On Wed, 29 Jan 2020, 18:36 Erick Perez - Quadrian Enterprises, < epe...@quadrianweb.com> wrote: > That happened to me several times > My USB was "burned" and never displayed new data copied to it. > By "burned" I mean the flash drive was faulty up to a point where it always > showed a phantom image of what WAS in the pen drive. > > But YMMV > > On Wed, Jan 29, 2020, 11:56 AM J Martin Rushton via CentOS < > centos@centos.org> wrote: > > > What's your dd command? Are you sure you are writing to the raw disk > > and not inside a partition? > > > > On 29/01/2020 16:30, Jerry Geis wrote: > > > Well after a closer look - Seems like the OLD 8.0 iso image is still on > > the > > > USB. Not the new 8.1 > > > > > > I have tried to redo the dd command to copy the 8.1 iso - I get no > > errors - > > > but it still comes up with the 8.0 > > > I then tried to remove the partitions, save and recopy. still same old > > boot > > > menu. > > > > > > Is there a trick to write over the UEFI stuff ? > > > > > > Jerry > > > ___ > > > CentOS mailing list > > > CentOS@centos.org > > > https://lists.centos.org/mailman/listinfo/centos > > > > > > > -- > > J Martin Rushton MBCS > > ___ > > CentOS mailing list > > CentOS@centos.org > > https://lists.centos.org/mailman/listinfo/centos > > > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 8 on USB disk
That happened to me several times My USB was "burned" and never displayed new data copied to it. By "burned" I mean the flash drive was faulty up to a point where it always showed a phantom image of what WAS in the pen drive. But YMMV On Wed, Jan 29, 2020, 11:56 AM J Martin Rushton via CentOS < centos@centos.org> wrote: > What's your dd command? Are you sure you are writing to the raw disk > and not inside a partition? > > On 29/01/2020 16:30, Jerry Geis wrote: > > Well after a closer look - Seems like the OLD 8.0 iso image is still on > the > > USB. Not the new 8.1 > > > > I have tried to redo the dd command to copy the 8.1 iso - I get no > errors - > > but it still comes up with the 8.0 > > I then tried to remove the partitions, save and recopy. still same old > boot > > menu. > > > > Is there a trick to write over the UEFI stuff ? > > > > Jerry > > ___ > > CentOS mailing list > > CentOS@centos.org > > https://lists.centos.org/mailman/listinfo/centos > > > > -- > J Martin Rushton MBCS > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 8 on USB disk
Sorry for the noise... My machine must not be working. I copied the iso to another machine, did the same command as always and worked just fine. not sure what is up with my normal box. Has always worked before. Jerry ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 8 on USB disk
What's your dd command? Are you sure you are writing to the raw disk and not inside a partition? On 29/01/2020 16:30, Jerry Geis wrote: Well after a closer look - Seems like the OLD 8.0 iso image is still on the USB. Not the new 8.1 I have tried to redo the dd command to copy the 8.1 iso - I get no errors - but it still comes up with the 8.0 I then tried to remove the partitions, save and recopy. still same old boot menu. Is there a trick to write over the UEFI stuff ? Jerry ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- J Martin Rushton MBCS ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 8 on USB disk
Well after a closer look - Seems like the OLD 8.0 iso image is still on the USB. Not the new 8.1 I have tried to redo the dd command to copy the 8.1 iso - I get no errors - but it still comes up with the 8.0 I then tried to remove the partitions, save and recopy. still same old boot menu. Is there a trick to write over the UEFI stuff ? Jerry ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS 8 on USB disk
I did the dd if=CentOS-8.1.1911-x86_64-dvd1.iso of=/dev/sdd to a 16G USB disk then tried to use it on an install. The installer said invalid install media. Any way to verify if the "write" to disk was good ? I got no errors on the dd. I did re-download the iso and did a diff and there was no diff. So I think my iso is OK. Jerry ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
