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Bill Vermillion's Tape Articles-Intro- Magnetism and Electrons



Title Last Comment
Value of bit-level verifying a backup  
- You'd probably be surprised how often a bit level verify proves useful. I receive backup status email for several of my clients, so I can tell you that bit-level verification "failures" are not all that uncommon. -

Tape Errors - Openserver 5.0.7  
- Having trouble with an IDE tape drive - Dell Powervault 100T (Travan 20/40 Gb drive). -

Transfer SCO Acucobol to Linux  
- The customer also told me that everything was written in Acucobol, and that he had source code too, and he had already bought Acucobol run-time for Linux -

travan  
- These are very inexpensive tape drives with a horrible reputation for quality. The tapes are expensive, because that's where all the engineering is. -

AIT  
- The interesting thing about this technology is that the tape media has an EEPROM in it that stores information about the tape contents and more. -

Backups  
- Compared to Windows, the world of Unix backup is extraordinarily rich. You have many tools available, from basic to quite complex and extensive. Knowing what tool to use is a challenge in itself. -

Reading SCO tapes on Linux  
- Reading SCO tapes on Linux requires being aware of hardware compression and tape block sizes. -

Tape Autoloader on 2.4 Linux  
- Rob Fantini explains how he got an autoloader tape unit working on RedHat Linux This info may not be clearly written, but shows what I did to get autoloaders working on 2.4 linux. -

Tape Drive or CDROM Not Found  
- SCO tape drive not seen troubleshooting solutions, using and interpreting sconf, vs. /etc/conf/cf.d/mscsi. -

Bill Vermillion's Tape Articles-Part 5  
- This section will talk about the evolution of tape backup systems for small computers, and discuss the fundamentals of rotating head tape recorders. In the next segment I'll try to go into more detail on the difference between each of the current types of data backup systems. -

Bill Vermillion's Tape Articles-Part 4, QIC Tape Format  
- This section will discuss the QIC method - and it's probably a good starting point as it's fairly easy to understand. The QIC [Quarter Inch Cartridge] is the data cartridge you have seen which measures about 3" by 5", and with a metal bottom plate. This is a very rugged design and it's more complex mechanically than you'd notice with a casual glance. -

Bill Vermillion's Tape Articles-Part 3, Storage Media  
- Tape Articles- Storage Media: This is the third installment of a series on magnetic devices and media used in computer systems. In this article we will look at the storage media, primarily tape and disk, and how signals are represented on that media. To better understand this I will compare the differences in audio tape, as most people are most familiar with that, and digital tape. -

Bill Vermillion's Tape Articles-Part 2, Recording and Playback Heads  
- A recording head is a horseshoe magnet taken to the extreme. The difference is that the open end of a recording head is extremely small. The easiest way to understand a very basic recording head is take a ring of metal, and cut a very small slot through it. Then we wrap some turns of wire around this ring on the side opposite the slot. Connect the wire it to an electron source, we will have a magnet with the magnetic field focused at that very small gap opposite the coil of wire. -

Bill Vermillion's Tape Articles-Intro- Magnetism and Electrons  
- To make sure that everyone has the level of knowledge to understand this, I'll start by explaining the basic fundamental concepts that relate to this technology. -

A Potential Disaster Using CPIO  
- The biggest error of my life occurred when I accidentally entered two consecutive periods {..}. -

SCO_OSR5 Tape Autoloaders  
- Generic Tape Autoloader Configuration Information forSCO OpenServer and Microlite Edge -

Super Tars  
- General overview of Unix/Linux supertar backup software, which provide backup flexibility and bare metal recovery. -

Using Tapes and tape drives  
- This is an old article about SCO Unix tapes and tape drives and is only left here for historical purposes. -

Using Unixware 7 Tape Drives  
- Unlike Openserver, you don't specifically add SCSI tapes. If the tape is out there (controller configured, of course), it will automagically get added to the kernel. -

 
 
LOD Communications, Inc.
 
 
(SCO Unix)I can't read a cpio archive created on a Linux box- it fails with premature end of file  
- (SCO Unix) I can't read a cpio archive created on a Linux box -

(SCO Unix)I see an error message on the console that starts with %Stp-0.  
- It would have caused less confusion if the driver announced its presence during boot so that it would show up with all the other hardware reported then. -

(SCO Unix)How do I configure a Travan Tape Drive?  
- Travan tape drives caused me a lot of problems. They were cheap, so many SCO Unix systems used them. Often they were unable to restore data. -

ONStream tape drives -->Re need suggested tape drivereplacement for Exabyte 8505 on OS 5.0.0C - plug and play,please!  
- ONStream tape drives Exabyte 8505 will not work with Unix! -