[DNG] strange effect on overwrite

Hi list, i found a strange ext4 (?) effect. when i write to a disk: dd if=/dev/zero of=xx bs=1G count=1 reports 2.6 GB (expected) doing again speed drops to 200MB. removing xx restores old speed. I ask the net and it seems that the effect is there since kernel 2.6. I found the explainations a

Re: [DNG] strange effect on overwrite

Hi, A blocksize of 1G seems extreme. What is the optimal blocksize of the output device? Cheers, -Rich On Thu, Jun 23, 2022, 4:52 AM Radisson via Dng wrote: > Hi list, > i found a strange ext4 (?) effect. > > when i write to a disk: > dd if=/dev/zero of=xx bs=1G count=1 > > reports 2.6 GB (ex

Re: [DNG] strange effect on overwrite

Its a normal HD i guess 4096 is ok, but i do not think that this matters. Am 23.06.22 um 13:11 schrieb Rich W: Hi, A blocksize of 1G seems extreme. What is the optimal blocksize of the output device? Cheers, -Rich On Thu, Jun 23, 2022, 4:52 AM Radisson via Dng wrote: Hi list, i found a s

Re: [DNG] strange effect on overwrite

This does not make sense to me: > >> dd if=/dev/zero of=xx bs=1G count=1 > >> > >> reports 2.6 GB (expected) IMO ~ 1GB is expected, not 2.6: $ dd if=/dev/zero of=xx bs=1G count=1 1+0 Datensätze ein 1+0 Datensätze aus 1073741824 Bytes (1,1 GB, 1,0 GiB) kopiert, 0,617959 s, 1,7 GB/s Nik Anno domin

Re: [DNG] strange effect on overwrite

On Thu, Jun 23, 2022 at 03:41:21PM +0200, Dr. Nikolaus Klepp via Dng wrote: > > >> > > >> when i write to a disk: > > >> dd if=/dev/zero of=xx bs=1G count=1 > > >> > > >> reports 2.6 GB (expected) > > >> doing again speed drops to 200MB. Isn't conv=sync needed to make sure that you are not just se

Re: [DNG] strange effect on overwrite

On Thursday 23 June 2022 at 15:41:21, Dr. Nikolaus Klepp via Dng wrote: > This does not make sense to me: > > >> dd if=/dev/zero of=xx bs=1G count=1 > > >> > > >> reports 2.6 GB (expected) > > IMO ~ 1GB is expected, not 2.6: > > $ dd if=/dev/zero of=xx bs=1G count=1 > 1+0 Datensätze ein > 1+0 D

[DNG] PHP question

Hello, I've been running Devuan on my break even public facing webhosting system for several years.  I've been using ISPConfig and the debian perfect server instructions with adjustments for Devuan.  I'm up to Devuan Beowulf at the moment and trying to go to chimaera so that I can get PHP 7.4

Re: [DNG] install on a raid 1 array

Hi, On Wed, 2022-06-22 at 16:26 -0500, o1bigtenor via Dng wrote: > On Sat, Jun 4, 2022 at 3:03 PM Simon wrote: > > > > o1bigtenor via Dng wrote: > > > > > I have not ever installed like this so first the configuration. > > > > > > Ryzen 7 3800X > > > Asus TUF Gaming X570-Pro   mobo > > > 64

Re: [DNG] PHP question

On Thursday 23 June 2022 at 17:49:03, Curtis Maurand via Dng wrote: > Hello, > > I've been running Devuan on my break even public facing webhosting > system for several years. I've been using ISPConfig and the debian > perfect server instructions with adjustments for Devuan. I'm up to > Devuan

Re: [DNG] PHP question

On 23-06-2022 17:49, Curtis Maurand via Dng wrote: Hello, I've been running Devuan on my break even public facing webhosting system for several years.  I've been using ISPConfig and the debian perfect server instructions with adjustments for Devuan. I'm up to Devuan Beowulf at the moment and

Re: [DNG] PHP question

I don't know anything about php. The only thing I know about this is that I found it on Github. https://github.com/dimkr/nosystem Regards, Ken On 6/23/22 11:49, Curtis Maurand via Dng wrote: Hello, I've been running Devuan on my break even public facing webhosting system for several years. 

Re: [DNG] PHP question

sury breaks devuan since the maintainer decided to use systemd specific libraries to create a temp file. instead, use tdrnetworks, which is basically sury, but gets rid of that dependency. See https://kb.unixservertech.com/unix/linux/debian/devuan_sury for complete information. I'm running Dev

Re: [DNG] strange effect on overwrite

Hi list, What is time between call dd? On ext filesystems is implemented delay before physically write date on disk. It's for e.g. minimally files fragmentation. Second question is that, did you try call "sync" command after each of writes? --- Best regards, Jakub Juszczakiewicz Krypto-I

Re: [DNG] install on a raid 1 array

On Thu, Jun 23, 2022 at 05:03:23PM +0100, Marjorie Roome via Dng wrote: > Hi, > > On Wed, 2022-06-22 at 16:26 -0500, o1bigtenor via Dng wrote: > > On Sat, Jun 4, 2022 at 3:03 PM Simon wrote: > > > > > > o1bigtenor via Dng wrote: > > > > > > > I have not ever installed like this so first the c

Re: [DNG] strange effect on overwrite

Speed tests on cached filesystems don't do what is expected. The kernel will write into RAM as much as it can, and leave the actual I/O for later. On Thu, Jun 23, 2022 at 12:39 PM Jakub Juszczakiewicz via Dng < dng@lists.dyne.org> wrote: > Hi list, > > What is time between call dd? On ext fi

Re: [DNG] install on a raid 1 array

o1bigtenor via Dng wrote: > First attempt > set up 2 raid 1s > except now I can't partition the drives You don’t partition the drives after creating an array with them - you partition the array (or just use it as a filesystem of LVM PV). > second attempt > set up 2 drives with some spacer part

[DNG] new system + graphics

Greetings Managed to get the new system running - - - yee haw!!! Now trying to get everything set up - - - lots of software to install - - - working on things. How do I get the open source drivers for my RX570 gpu installed AND working? lsmod says that I have amdgpu running - - - multiple instan

Re: [DNG] strange effect on overwrite

ael via Dng wrote: > Isn't conv=sync needed to make sure that you are not just seeing buffer > effects? Better oflags=sync,direct rather than conv=sync though both are similar in result. Bob signature.asc Description: PGP signature ___ Dng mailing lis