RISC OS Open: Forum: Interesting

Jan 25, 2017 10:21pm

Rick Murray (539) 13840 posts

In 2013, I was using an older class 4 2GB card. Unpacking the RISC OS sources took 28 minutes to unbzip, and several hours to untar; then about 50 minutes to build from scratch.
My newer self-built ROM (about March last year) behaved in much the same way.

I rebuilt RISC OS yesterday from the most recent source archive. I don’t recall how long it took to unbzip as the extraction process froze the machine (I was unpacking to a FileCore format USB stick). I unpacked again directly to SD card from the already expanded tar file (why decompress twice?) and it did the job in about 7-8 minutes. Seriously, it was done when I came back from making a cup of tea. I checked everything because I thought it must have missed bits, but no, it was done that quickly. I’m using a Class 10 card now, though I can’t imagine 4→10 would turns hours into minutes. I wonder if there have been other improvements in SDFS recently?
Building RISC OS from scratch still took about 50 minutes.

Jan 26, 2017 9:52am

Chris Hall (132) 3554 posts

Some times for unpacking are here

Jan 26, 2017 6:06pm

Chris Mahoney (1684) 2165 posts

I don’t recall when I did my first ROM build (probably 2005ish) but it’s never taken hours to untar for me (on a Pi 1). It may indeed just be your card :)

Jan 26, 2017 7:42pm

Rick Murray (539) 13840 posts

It may indeed just be your card :)

Prob’ly. After buying SystemDisc, I could go find a real card, rather than whatever the default image would fit on… ;-)

Jan 28, 2017 4:31pm

Glen Walker (2585) 469 posts

I have been using a 4GB C4 card and 16GB C10 card in a test computer recently (both running Armbian) – the difference in responsiveness was actually astonishing. I put the C10 card in thinking “nah it wont make that much difference, but I might as well try it…” and it made the process of installing/updating my software from apt-get feel much much better.

I have no idea what the times were but with the C4 card I looked at the progress indicator and the rate it was climbing and thought “I’ll come back in the morning” and with the C10 card it was fast enough that I was happy to sit and wait.

I wonder also if it was something to do with the C10 card being a branded Sandisk one…maybe the unbranded C4 card is just garbage?

Huzzah for SystemDisc! My plans exactly 64GB RISC OS boot SD for my old Pi B+…just need to get a copy of it now!

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Jan 25, 2017 10:21pm Rick Murray (539) 13840 posts	In 2013, I was using an older class 4 2GB card. Unpacking the RISC OS sources took 28 minutes to unbzip, and several hours to untar; then about 50 minutes to build from scratch. My newer self-built ROM (about March last year) behaved in much the same way. I rebuilt RISC OS yesterday from the most recent source archive. I don’t recall how long it took to unbzip as the extraction process froze the machine (I was unpacking to a FileCore format USB stick). I unpacked again directly to SD card from the already expanded tar file (why decompress twice?) and it did the job in about 7-8 minutes. Seriously, it was done when I came back from making a cup of tea. I checked everything because I thought it must have missed bits, but no, it was done that quickly. I’m using a Class 10 card now, though I can’t imagine 4→10 would turns hours into minutes. I wonder if there have been other improvements in SDFS recently? Building RISC OS from scratch still took about 50 minutes.

Jan 26, 2017 9:52am Chris Hall (132) 3554 posts	Some times for unpacking are here

Jan 26, 2017 6:06pm Chris Mahoney (1684) 2165 posts	I don’t recall when I did my first ROM build (probably 2005ish) but it’s never taken hours to untar for me (on a Pi 1). It may indeed just be your card :)

Jan 26, 2017 7:42pm Rick Murray (539) 13840 posts	It may indeed just be your card :) Prob’ly. After buying SystemDisc, I could go find a real card, rather than whatever the default image would fit on… ;-)

Jan 28, 2017 4:31pm Glen Walker (2585) 469 posts	I have been using a 4GB C4 card and 16GB C10 card in a test computer recently (both running Armbian) – the difference in responsiveness was actually astonishing. I put the C10 card in thinking “nah it wont make that much difference, but I might as well try it…” and it made the process of installing/updating my software from apt-get feel much much better. I have no idea what the times were but with the C4 card I looked at the progress indicator and the rate it was climbing and thought “I’ll come back in the morning” and with the C10 card it was fast enough that I was happy to sit and wait. I wonder also if it was something to do with the C10 card being a branded Sandisk one…maybe the unbranded C4 card is just garbage? Huzzah for SystemDisc! My plans exactly 64GB RISC OS boot SD for my old Pi B+…just need to get a copy of it now!