Mac OSX und dd kann sehr langsam sein

Interessante Erkentnisse beim Schreiben eines Linux-ISO-Images auf einen USB-Stick unter Max OSX:

Der USB-Stick ist /dev/disk3

aquinas:Downloads romal$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *128.0 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS SSD                     127.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *320.1 GB   disk1
   1:                        EFI                         209.7 MB   disk1s1
   2:                  Apple_HFS Festplatte              319.7 GB   disk1s2
/dev/disk3
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *18.8 MB    disk3
   1:        Apple_partition_map                         32.3 KB    disk3s1
   2:                  Apple_HFS Flash Player            18.7 MB    disk3s2
aquinas:Downloads romal$

Abmelden mit:

diskutil unmountDisk /dev/disk3

und 1.5 Stunden warten auf:

sudo dd if=Fedora-20-Beta-TC2-x86_64-DVD.iso of=/dev/disk3

oder fünf Minuten auf:

sudo dd if=Fedora-20-Beta-TC2-x86_64-DVD.iso of=/dev/rdisk3 bs=1m

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