Re: Question about USB R/W Speed

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Author: Matt Graham
Date:  
To: Main PLUG discussion list
Subject: Re: Question about USB R/W Speed
From: Mark Phillips <>
> Matt Graham <> wrote:
>> If ehci_hcd isn't loaded, then USB2 devices will be limited to USB1

speeds.
> OK, # lspci |grep -i ehci


That just tells you whether an EHCI controller is present on the PCI bus (one
is). You want "lsmod | grep ehci", which will tell you whether the ehci_hcd
kernel module is loaded.

> How do I check if devices are automounted with -o sync?


This depends on whether you're using an automounter and which one you're
using. I can't help that much with the automounter config, since I always
mount removable media manually and use fstab entries. But if you plug the
device in and start doing stuff with it, typing "mount" in a terminal should
show you a bunch of output with a line like

/dev/sdb1 on /mnt/somewhere type vfat (rw,noauto,users,umask=000)

...where the stuff within ()s is the options the device was mounted as.
"sync" probably shouldn't be in there if you want the fastest possible I/O.

--
Matt G / Dances With Crows
The Crow202 Blog: http://crow202.org/wordpress/
There is no Darkness in Eternity/But only Light too dim for us to see

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