usb delayed write – (some explanation)

FROM: Remove_Sticks_Safely.pdf [APC – Magazine; Page-102 ~ February 2008]

When you write data to a USB storage device, there’s no guarantee the data is written at that exact moment.

This is the result of the operating system storing up read and write jobs so they can be executed in a single batch – speeding up performance and providing a better user experience.

However, if you remove the device before the data has been written you’ll lose the data.

This is why 0S X, Windows and Linux ask you to warn the operating system youre about to remove the device – usually by clicking on an icon or menu option.

GRD-COMMENT ~ That explanation is VERY good – and provides REASON enough WHY any user should ‘Remove_Sticks_Safely’

ANOTHER SENARIO: – (Saved as text files, so pasted here)

FROM – URL: – http://www.pcmag.com/article2/0,2817,1819756,00.asp

Disabling Delayed-Write in Windows – 05.18.05 – by Neil J. Rubenking

Microsoft Windows has a feature that, at least for me, is very annoying. When I transfer files to an external device, such as an external hard drive, Windows indicates when the task is completed. However, if I immediately disconnect the external device, I get a Windows error message saying that the transfer of files was not complete because delayed-write was not finished. In other words, Windows continues its transfer process in the background for several minutes after it gives all appearances of having completed the task. Is there a way to determine when the delayed-write process is actually completed? Or, even better, is there a way to disable delayed-write so that Windows transfers only files in real time and does not report the task as complete until it is actually completed?

David A. Coup

If the drive is connected via USB, you will normally see an icon appear in the system tray when you plug it in. You can right-click on the icon and “Stop” the drive, which forces all pending writes to complete. Windows then reports that you can safely remove the drive. If it’s another type of external device, try disabling write caching for it in Device Manager. Specifically:

# Right-click on My Computer and choose Properties.

# Click on the Hardware tab.

# Click on the Device Manager button.

# Find the device in the list, probably under “Disk Drives.”

# Right-click on the device and choose Properties.

# Click on the Policies tab.

# Uncheck Enable write caching on disk.

# Click on OK.

That should do it. Note that you can disable write caching for internal hard drives as well, but doing so may affect system performance.

Knoppix 6.2 ~ is fun!

Installed pendrive version of knoppix-6.2 onto 4GB USB stick – Everything required just works. NOTE; Need Administrator permissions to successfully install to a usb stick

Setup Internet connection, (Not to hard – if you have the ISP / DNS ip numbers)

TESTED on older hardware HP – D530 mobo

Open Office 3, starts QUICKLY, .. most impressed. Will be using it again soon.

Downloaded Knoppix 6.2 from pendrivelinux

The distro is provided as an ISO file – and there is a installer file – USB-Installer-For-Knoppix6.2-v0.2.exe – which installs the OS to the USB without any fuss, just point the installer to the downloaded ISO file, and provide a path to the blank USB stick and thats it.

Some development information on wikipedia about ‘ADRIANE’ (development started around Jan-09, and Knoppix-Ver 6.2 / ADRIANE 1.2 released 18 November 2009)

The KNOPPIX 6.0.1 / ADRIANE 1.1 is a CD-edition again, and a complete rebuild from scratch. LXDE as default desktop and a very reduced software collection in order to easily fit on CD.

Adriane Knoppix is a variation that is intended for blind and visually impaired people, which can be used entirely without vision oriented output devices.

This review by Dmitri Popov provides a nice overview (If anybody is interested)

USB printer using LPT1 port

USER; Jonna (Has the following question)
Trying to print with USB printer using LPT1 port

THE SENARIO: – Looking for a little help from someone who can help me print to my USB printer using my LPT1 port? – We have an old genealogy software program that does not recoginze USB printers. Any ideas? – Thankyou!

USER; WhitPhil (responds)
DOS doesn’t recognize USB ports. – But, you can try this app. I haven’t tried it, but have seen it posted in another thread.

Using the ‘Mount-Command’ on a linux box

At The Linux Command Line
URL: http://www.youtube.com/watch?v=fqhEpvhZ4ck

TechAnvil
20 October 2006

USB flash drives are great for moving files on and off of a linux server, but how do you do it? This quick tutorial shows you how easy it is!

#1: Create a Directory
mkdir /mnt/sda1

#2: Mount the USB drive
mount /dev/sda1 /mnt/sda1

AUTO – MOUNT:
AND; ~ I/you need to create a ‘Auto-mount’ function in Gnome

/etc/fstab
AND-ADD; (The following line? ADD it to WHAT? – The fstab – File?)
/dev/sda1 /mnt/sda1 vfat rw,user,noauto 00

Now once you have done that, you can type, …
mount /dev/sda1
AND; The rest of the settings will be pulled from the fstab file.

TO UNMOUNT A DRIVE: (Not always required? ? ? )
umount /dev/sda1

The Episode Dedicated to Ken Thompson, Father of the Unix Operating System.

I have also posted this on ‘Lampstack’ – (http://lampstack.dynalias.net/joomla/)