ko/s, time to format a cdrw
Hello, I would like to know how many time does it take to format a cdrw with this command: #cdrwtool -t12 -q -d /dev/hda On my computer with this burn drive: samsung cdrw/dvd sm-352f, firmware T902 it takes more than 20 mn!!! (4X cdrw disc) And always in "normal conditions", what is the speed of transfer data in kilooctet /second. Mine is very poor... Compare to windows softs like directcd or Nero incd, it is slower? Thanks for your help. Le gluon du net.
Le Gluon du Net wrote:
Hello,
I would like to know how many time does it take to format a cdrw with this command:
#cdrwtool -t12 -q -d /dev/hda
On my computer with this burn drive: samsung cdrw/dvd sm-352f, firmware T902 it takes more than 20 mn!!! (4X cdrw disc)
The disk and the drive determine the maximum writing speed, it is the minimum of the two. In this case it looks like you have a drive that supports at least 12X, but you are using a 4X cdrw disc. When referring to a disk or drive as number"X", where number is something like, 2, 4, 8, 16, 20, 24, 40, etc, the actual speed is that number multiplied by the original CD data transfer rate. The original rate was 150 KB/s (one hundred fifty kilobytes per second) taken from audio CDs. So a 4X disk can be written at 600 KB/s (six hundred kilobytes per second). If the disk is 700 MB, then it takes 700 MB / 0.6 MB/s = 1160 s = 19 minutes 20 seconds to format/blank the 4X disk. If you stuck it in a 2X cdrw drive, then it would take twice as long. Note that DVD drives usually consider 1X as about 1500 KB/s. Now if you do a "quick" blank, usually only the Table of Contents (TOC) is erased. This is okay when you just want to write an ISO image or other static filesystem. But when doing packet writing using cdrwtool, the entire disk needs to be formated. (It *might* be possible to avoid formating the entire disk if it was previously formated, but I do not think it likely... You care about your data, right? (slight sarcasm))
And always in "normal conditions", what is the speed of transfer data in kilooctet /second. Mine is very poor...
English usually prefers kilobyte (1 byte = 8 bits) to kilooctet. However, this creates confusion when using the abbreviation, due to the use of kilobit. The abbreviations become KB or Kb. The later is usually kilobit (which is used when talking about serialized data streams like an ethernet or modem connection) and the former kilobyte (which is used when referring to devices which act on blocks, like a hard drive or CD-ROM). (Though I might have mixed up the abbreviations...)
Compare to windows softs like directcd or Nero incd, it is slower?
No.
Thanks for your help.
Le gluon du net.
Cheers, Johnny
participants (2)
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Johnny Casey
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Le Gluon du Net