dd question

[William A. Mahaffey III]

On 09/26/15 19:57, Quartz wrote:
>> Well first off I'd tell dd to use a bigger bs like 1m.
>
> I'll second this. I think the default for mos *nixs is 512 byte 
> blocks, which is painfully slow. You need to manually specify bs=1M.
>
> It's also possibly the stick is just dying, but try the blocksize first.


I tried the 'bs=1m' & it sped things up by about 40X (from 90-ish KB/s 
to 3.4-ish MB/s) :-) .... All is well.


As an aside, is there a way to configure the stick's FS to use/report 
all available space, rather than what the img was sized to, *after* 
dd-ing the img ?


[root at kabini1, /etc, 8:09:41pm] 342 % df
Filesystem            Type      1024-blocks      Used      Avail 
Capacity  Mounted on
/dev/ada0p3           ufs          20307196  12140912    6541712 65%    /
devfs                 devfs               1         1          0 100%    
/dev
/dev/stripe/usr_str   ufs          60921596  10477380   45570492 19%    /usr
/dev/stripe/home_str  ufs        3684793728 220043372 3169966860 6%    /home
procfs                procfs              4         4          0 100%    
/proc
tmpfs                 tmpfs         8388608        32    8388576 0%    /tmp
linprocfs             linprocfs           4         4          0 100%    
/compat/linux/proc
fdescfs               fdescfs             1         1          0 100%    
/dev/fd
/dev/da0a             ufs            698671    651741      -8963 101%    
/media/sd
[root at kabini1, /etc, 8:09:52pm] 343 %


i.e. /media/sd shows about 698 MiB instead of full 4-ish MB it is really 
sized to .... TIA for any clues :-).

-- 

	William A. Mahaffey III

  ----------------------------------------------------------------------

	"The M1 Garand is without doubt the finest implement of war
	 ever devised by man."
                            -- Gen. George S. Patton Jr.