#Earthnet zip file serial#
#Earthnet zip file software#

(You also need a drive that supports 1.35 MBps throughput, which a lot of old drives couldn’t do. This means that any Mac with a 68020 or 68030 CPU has the potential to saturate a 10 Mbps ethernet network.

#Earthnet zip file serial#

The Mac II had a decent SCSI port in its day, providing 1.35 MBps throughput or 11 Mbps* – slightly faster than regular ethernet and as nearly fast as the new USB (universal serial bus) in the iMac. This is well beyond the capacity of 10 Mbps ethernet and helps explain the growing popularity of 100 Mbps ethernet. (Older drives, like older computers, tend to be slower.) All of these are faster than ethernet: IDE, SCSI-1, USB, and 16x or faster CD-ROM drives.Ĭonverted to the language of networking (bits per second, not bytes), a good hard drive today can read and write data at 40-100 Mbps. Today’s Ultra SCSI is four times faster, although few drives can read or write beyond 12 MBps – and most are in the 6-8 MBps range.

Even the original SCSI standard supports up to 5 MBps (megabytes per second, note upper case B), although earlier Macs couldn’t achieve that speed. Mac users love SCSI because it has great bandwidth.

#Earthnet zip file software#

There are two factors that determine network throughput: How fast a computer can prepare the data for transmission (i.e., read it from the hard drive) and how many bits per second the networking software and hardware allow. Granting that there is overhead for reading and writing data during backup, plus keeping a backup catalog, normal ethernet can hit maybe 8 Mbps with TCP/IP and 5 Mbps with AppleTalk. The less efficient AppleTalk protocol hits about half that. Looking over my Retrospect backup logs at work on a 10Base-T network, I note that top throughput is rarely over 5 Mbps using TCP/IP. Although this is rated as a 10 Mbps protocol, real world performance rarely hits that level. I can see where it’s an inexpensive solution, but I couldn’t understand why it was a good solution.Īlthough some of us still use poky old LocalTalk for networking, the standard in business is 10 Mbps (megabits per second, note lower case b) ethernet using coaxial or twisted-pair wiring. He recommends this for small office setups, not graphic departments. Barber does something I didn’t understand for a long time: he recommends using a Mac Plus or Mac SE – or whatever your slowest Mac is – as a file server!