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- RoInfo Page 1
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- ┌─────────────────────────────────────────┐
- │ RoInfo Hard Drive Information Program │
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- │ August 12, 1988 │
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- │ Revision 1.0 │
- └─────────────────────────────────────────┘
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- RoInfo and this document (c) 1988
- /-RoRoWare-/
- by Robert Sink, Jr.
- The Sixteen Bit Exchange BBS
- (703) 342-6386
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- WARRANTY
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- The author makes no warranty of any kind, expressed or implied, including
- without limitation, any warranties or merchantability and/or fitness for a
- particular purpose. The author shall not be liable for any damages, whether
- direct, indirect, special or consequential arising from a failure of this
- program to operate in the manner desired by the user. The author shall not
- be liable for any damage to data or property which may be caused directly or
- indirectly by the use of this program.
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- IN NO EVENT WILL THE AUTHOR BE LIABLE TO YOU FOR ANY DAMAGES, INCLUDING
- ANY LOST PROFITS, LOST SAVINGS OR OTHER INCIDENTAL OR CONSEQUENTIAL
- DAMAGES ARISING OUT OF YOUR USE OR INABILITY TO USE THE PROGRAM, OR FOR
- ANY CLAIM BY ANY OTHER PARTY.
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- RoInfo Page 2
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- Explanation of RoInfo:
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- RoInfo was designed as a guide to ease in the setup/use of hard drives.
- RoInfo provides total information on two of the largest and most used hard
- drive brands today - Seagate and Miniscribe. Not to mention RoInfo also
- gives technical assistance numbers in case you need to contact the
- companies, minor definitions of all the encoding methods (such as MFM, RLL,
- etc..) And also provides the "DEBUG FORMAT ADDRESS CODES" for low-level
- formatting.
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- Technical information about RoInfo:
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- RoInfo was written in Turbo Pascal* 4.0, using TTT (Technojock's Turbo
- Toolkit) for various windowing and cosmetical enhancements. RoInfo in
- it's entirety is a very simple program providing the user with quick and
- easy reference to perhaps some of the most needed and forgotten
- information facing the continual use of hard drives around the country.
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- Definitions of terms used in RoInfo:
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- Since there was alot of information on these drives and so little space to
- put it, I found myself making abbreviations for the statistics on the
- table. Although the program gives a fairly understandable key, it is
- going to be explained to you here on a more understandable level.
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- Model - This can explain a considerable amount to you about the drive.
- Such as size, disk capacity, series, etc.. (explained further
- on..)
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- Disks - Platters, these are the actual "storing" parts of a hard drive.
- These spin and are read and wrote to by the heads.
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- Heads - Heads read and write information to the drive by reading the
- platters (disks). There are usually two heads per every disk (one
- reads the top, the other the bottom).
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- AcsTime - Access time. This is a general average of how fast the head is
- able to read the data from the spinning media (disks).
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- RoInfo Page 3
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- (definitions continued...)
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- Trk2Trk - Track to track access time. This is similar to the regular
- access time, but this is a judgement of how fast the heads can
- read sequential data (track to track). This value is usually
- considerably lower than the regular access time value.
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- AvgPwr - Average power consumption by this particular drive.
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- Size - This is usually defined by "HH" or "FH". HH being half height,
- or FH being full height (two half height drives).
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- MTBF - Mean time between failure. This is how long the drive
- can go before a failure in the hard drive is possilble
- (measured in hours, and considering the drive gets normal use).
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- ActTyp - Actuator type. The actuator is the device that positions the
- heads over the media. The actuator usually plays an important
- part in the access time of the drive.
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- EncMtd - Encoding method that the drive is rated for. Such as MFM, RLL,
- ESDI, or SCSI.
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- SctrPt - What the hard drive's sector per track rating is. This is more
- dependant of the controller than it is the hard drive.
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- AutoPk - Merely tells if the drive will auto-park its heads if power is
- removed or if it is not supported, then the hard drive parking
- procedure must be assisted by a software sequence or program.
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- Media - Gives a list of the coating and/or oxides found on the hard
- drive platters. Explains what kind of controller is most optimum
- for this hard drive as well.
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- Megs - Explains the disks formatted capacity (i.e. free space after a
- high level format.)
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- Help in understanding what the model number of a drive indicates:
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- Miniscribe information:
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- Miniscribe drives consist of 4 or 5 digit model numbers and in there, it
- explains the disks' size, and capacity - as follows..
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- 6128
- ││││
- │└┴┴────────> Indicates the drive's unformatted capacity.
- └───────────> Indicates the drive's physical size FH or HH.
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- Drives beginning with 3's are half height, drives beginning with 6's are
- full height, and drives beginning with 8's are 3.5's.
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- RoInfo Page 4
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- (understanding drive model numbers continued...)
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- Seagate information:
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- Seagate drives consist of 5-7 digit model numbers and in there, it
- explains the disks' size, revision, and/or RLL, MFM or SCSI compatibility.
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- ST238R
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- │││││└──────> Indicates the drive is RLL compatible.
- │││└┴───────> Indicates drive's unformatted capacity.
- ││└─────────> Indicates the drive's physical size FH or HH.
- └┴──────────> Indicates "Seagate Technology".
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- Drives that have "N" prefixed to the end of their model number are SCSI
- compatible drives such as "ST225N".
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- Drives that end in "-1" or any other numerical value indicate revision
- number such as "ST251-1" which is a revision of the ST251 that is 10 ms.
- faster than the older ST251.
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- Seagate drives beginning with a "ST1" are 3.5" drives. Seagate Drives
- beginning with a "ST2" are half height drives. And Seagate drives
- beginning with a "ST4" are full height drives.
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- Notes from the author:
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- This program's main purpose is to provide the most clear-cut information
- concerning hard drives as possible. Though we feel the information on the
- two drive brands (Miniscribe and Seagate) is complete and as accurate as
- can be, there is no reason why other drive manufacturers couldn't be
- included in future releases. If you happen to have some information (any
- information) that could help us out, we'd definitely appreciate your
- help. If you find any of the statistic and/or information here or within
- to be no longer accurate or inacurate, we would appreciate you letting us
- know as soon as possible. We may be reached on the following BBSs:
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- The Sixteen Bit Exchange BBS
- 24 hrs/day 7 days/week
- (703) 342-6386 - my BBS
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- PhotoStar BBS
- 24 hrs/day 7 days/week
- (703) 774-4667
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- Bedlam BBS
- 24 hrs/day 7 days/week
- (703) 890-5733
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- RoInfo Page 5
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- Acknowledgments:
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- I'd like to thank Mike Overacker - SysOp of the PhotoStar BBS for
- providing some of the information in compiling this list of statistics.
- And hope he'll have other help in the future (other than parties)...
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- Robert Sink - SysOp of the Sixteen Bit Exchange
- RoRoware
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- * Turbo Pascal is a registered trademark of Borland International, Inc.
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- [end of RoInfo document]