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| author | Jeppe Fihl-Pearson <tenzer@tenzer.dk> | 2022-03-30 21:07:20 +0100 |
|---|---|---|
| committer | Bjørn Forsman <bjorn.forsman@gmail.com> | 2022-04-01 22:14:04 +0200 |
| commit | b5f36e84d14a8ac695e306611340435ac448b7ed (patch) | |
| tree | 2c362fa8b9a87d8ef826b885a1d6e37bec7e9702 /nixos/doc/manual/installation/installing-usb.section.md | |
| parent | eeb3206a29560a6b9ad141b27fa4eec51058e4d7 (diff) | |
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Add block size to dd command
Without configuring the block size a default of 512 bytes is used, which can slow down the transfer speed massively. In a test I've done with a semi-decent USB stick, I only get a transfer speed of around 180 KB/sec when not specifying the block size but see 27 MB/sec when setting the block size to 1 MB. This makes the transfer of the minimal installation ISO take half a minute instead of an hour.
Diffstat (limited to 'nixos/doc/manual/installation/installing-usb.section.md')
| -rw-r--r-- | nixos/doc/manual/installation/installing-usb.section.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/doc/manual/installation/installing-usb.section.md b/nixos/doc/manual/installation/installing-usb.section.md index ae58c08e5237..d893e22e6381 100644 --- a/nixos/doc/manual/installation/installing-usb.section.md +++ b/nixos/doc/manual/installation/installing-usb.section.md @@ -18,7 +18,7 @@ $ diskutil list [..] $ diskutil unmountDisk diskN Unmount of all volumes on diskN was successful -$ sudo dd if=nix.iso of=/dev/rdiskN +$ sudo dd if=nix.iso of=/dev/rdiskN bs=1M ``` Using the \'raw\' `rdiskN` device instead of `diskN` completes in |