Good point, but fortunately this has been thought of. The next digit after the birthday is "+" if you are born in 18XX, "-" if you are born in 19XX or "A" if you are born in 20XX, probably "B" if you are born in 21XX and so on.
However, problems may occur if a programmer has taken a tempting shortcut and ignored this digit assuming everybody was born in 19XX.
Actually the example id number "040463-395F" has incorrect checksum. The Finnish ID number has a checksum digit to detect incorrect ID numbers.
The first six digits tell your birthday in DDMMYY form. The next digit can be "+" if your born in 18XX, "-" if your born in 19XX or "A" if born in 20XX. The next three digits contain a consecutive number to uniquely identify people born who were born in the same day. This number is even for female and odd for male.
The last digit is a checksum calculated from the first 9 numbers of the ID. This 9 digit number is divided by 31 and the remainder of this division determines the last digit of the ID.
e.g. in this case:
040463395 / 31 = 1305270, remainder 25.
For remainder of 25 the checksum digit is T, not F. (remainder = 0-9, checksum digit = 0-9. Remainder = 10, checksum digit = A, 11 = B, 12 = C, etc.)
Sounds pretty interesting... it says 10 Mbps at 5000 feet... I assume you get less Mbps the farther you go out... actaully the sales rep was supposed to get me this info, and never did... I'll get on his back about it....
Actually, it's 10Mbps up to 4000 ft but
that's just an estimate and it depends on the quality of cabling etc. I've briefly tried LRE at 15Mbps over 1430m (4691 ft) of old telephone cabling and it seemed to work just fine.
Cisco LRE Rates and distancies from their white papers :
5-Mbps symmetric rate (up to 5,000 feet)
10-Mbps symmetric rate (up to 4,000 feet)
15-Mbps symmetric rate (up to 3,500 feet)
The biggest noise maker on my PC is the CDROM when it spins up to read a file. I liked my old (slow) drive that was quiet and didn't take so long to start reading.
A lot of CD-ROM drives support different spindle speeds these days. For the software required, see my previous post on this subject.
sometimes the CD-ROM drive would vibrate really bad.
There are ways to slow down the spindle speed of a CD-ROM drive, which reduces the level of noice and vibration considerably.
Take a look at these utilities:
setcd (debian package) CDBremse for Windows or compile a piece of code in this usenet discussion (the article is in Finnish, but code is written in English)
Slashdot Mirror
However, problems may occur if a programmer has taken a tempting shortcut and ignored this digit assuming everybody was born in 19XX.
The first six digits tell your birthday in DDMMYY form. The next digit can be "+" if your born in 18XX, "-" if your born in 19XX or "A" if born in 20XX. The next three digits contain a consecutive number to uniquely identify people born who were born in the same day. This number is even for female and odd for male.
The last digit is a checksum calculated from the first 9 numbers of the ID. This 9 digit number is divided by 31 and the remainder of this division determines the last digit of the ID.
e.g. in this case:
040463395 / 31 = 1305270, remainder 25.
For remainder of 25 the checksum digit is T, not F. (remainder = 0-9, checksum digit = 0-9. Remainder = 10, checksum digit = A, 11 = B, 12 = C, etc.)
Actually, it's 10Mbps up to 4000 ft but that's just an estimate and it depends on the quality of cabling etc. I've briefly tried LRE at 15Mbps over 1430m (4691 ft) of old telephone cabling and it seemed to work just fine.
Cisco LRE Rates and distancies from their white papers :
5-Mbps symmetric rate (up to 5,000 feet)
10-Mbps symmetric rate (up to 4,000 feet)
15-Mbps symmetric rate (up to 3,500 feet)
A limitation of this product to consider:
- 32GB formatting limit (which according to the website: expect will be "field upgradeable" with a Note: This "field upgrade" is not a certainty)
IMO the only advantages I can think of using this solution instead of buying an IDE controller card or using MB's IDE controller:
- connecting 7 drives in a single cable
- if you don't have any spare IRQs for IDE
- you want to visit your SCSI-only-friend with your IDE-drive
Hardly any extra performance or reliability of SCSI is gained with this solution.
The biggest noise maker on my PC is the CDROM when it spins up to read a file. I liked my old (slow) drive that was quiet and didn't take so long to start reading.
A lot of CD-ROM drives support different spindle speeds these days.
For the software required, see my previous post on this subject.
sometimes the CD-ROM drive would vibrate really bad.
There are ways to slow down the spindle speed of a CD-ROM drive, which reduces the level of noice and vibration considerably.
Take a look at these utilities:
setcd (debian package)
CDBremse for Windows
or compile a piece of code in this usenet discussion
(the article is in Finnish, but code is written in English)