Website: Making Haiku USB Stick - Mac OS improvement
The guide instructs the user to use this command:
sudo dd if=path/to/haiku-anyboot.image of=/dev/disk[x] bs=1m
Writing in this way to /dev/disk[x] is _VERY_ slow. As in 45 minutes on a fast USB 2 drive slow. Simply changing to
sudo dd if=path/to/haiku-anyboot.image of=/dev/rdisk[x] bs=1m
will speed things up by a huge amount, like a couple of minutes to copy the whole image.
It would be nice to be able to make comments or suggestions like this on the web page itself, as I am not sure this will actually get to the right people.
Perhaps a few people could try it to check it works, and if so then update the guide?
Comments
Re: Website: Making Haiku USB Stick - Mac OS improvement
The default value for 'block-size' is 256 bytes! Talk about a tons of handshakes needed.
Personally when in doubt I use bs=65536 but have found bs=2M to be the fastest and bs=4M will slow the transfer rate but quite a bit. I agree with you too that an update would be a good idea.
Re: Website: Making Haiku USB Stick - Mac OS improvement
Yep, that's a silly number of writes. bs=1m seems to work fine, I don't if there's a way to figure out an optimum other than empirically.
/dev/rdisk[x] writes directly to the disk (raw), instead of using some kind of buffer in a kernel driver that is used with /dev/disk[x], and is so much faster it's unreal.
45 minutes to copy 700MB to a fast USB drive is too long, especially when you can just as easily do it in a minute or so by typing a single extra character!
Re: Website: Making Haiku USB Stick - Mac OS improvement
Yep, that's a silly number of writes. bs=1m seems to work fine, I don't if there's a way to figure out an optimum other than empirically.
/dev/rdisk[x] writes directly to the disk (raw), instead of using some kind of buffer in a kernel driver that is used with /dev/disk[x], and is so much faster it's unreal.
45 minutes to copy 700MB to a fast USB drive is too long, especially when you can just as easily do it in a minute or so by typing a single extra character!
sudo dd if=path/to/haiku-anyboot.image of=/dev/disk[x] bs=1m
Writing in this way to /dev/disk[x] is _VERY_ slow. As in 45 minutes on a fast USB 2 drive slow. Simply changing to
sudo dd if=path/to/haiku-anyboot.image of=/dev/rdisk[x] bs=1m
There has to be something wrong with MAC os, becuase in Haiku a USB thumb drive with DD takes about 5-8 minutes on average for a ALPHA