I'm quite familiar with Linux, just now starting to learn Solaris. To benchmark a filesystem on Linux, I might use dd:

dd if=/dev/zero of=/mnt/nas11/temp bs=1M count=1000 conv=fdatasync
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 2.96195 s, 354 MB/s

But on Solaris 11.4 it does not display the speed. Is there some way to make it show the speed? I know I can run this with time but then I want the computer to do the math for me.

dd if=/dev/zero of=/tank/ddtest bs=1000000 count=100 && sync
100+0 records in
100+0 records out

It seems that many "standard" tools work differently here, like conv=fdatasync doesn't work.

  • What version of Solaris? Back in the day, I would have to install the GNU tools separately; they'd have a 'g' in front of the tool name. Does gdd exist? Aug 28, 2019 at 0:41
  • This is 7.4. I will look into the GNU tools, thanks
    – Elliott B
    Aug 28, 2019 at 0:42
  • 2
    dd is a POSIX-standard utility. Features such as conv=fdatasync on Linux are non-standard, non-portable GNU extensions to the standard utility. If you need to time a command, you can use the POSIX-standard time utility. Aug 28, 2019 at 10:46
  • There was no "Solaris 7.4" release. Do you mean Solaris 11.4 from 2018 or Solaris 7 update 4 from 1999? You can't expect a 20-year old OS to operate the same as modern OS'es.
    – alanc
    Aug 29, 2019 at 0:00
  • Sorry yes I meant 11.4
    – Elliott B
    Aug 29, 2019 at 0:00

2 Answers 2


See pipe viewerpv. It is a default tool on Solaris. You can use it like:

dd if=/dev/zero count=100000 2>/dev/null|pv|dd of=/dev/null 2>/dev/null
48.8MiB 0:00:01 [35.9MiB/s] [        <=> ]

gdd is the version of dd that you want to use. On Solaris, GNU tools are installed with a 'g' in front; for example, the GNU version of tar would be called as gtar.

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