On Saturday 06 August 2005 08:39 pm, Larry Nguyen wrote: > > Ra^'t tie^'c ca'i "man dd" cu?a Linux 0 ro~ ra`ng ba(`ng *BSD. > "info coreutils dd" tre^n Linux cu~ng 0 ba(`ng. Cha'u hay xem le'n > cu?a FreeBSD > > :) Ba'c go~ dd va`o trang na`y http://www.freebsd.org/cgi/man.cgi > : ro^`i > > cho.n Submit. No' gia?i thic'h chua^?n read/write (ibs and obs) la` > 512 bytes. Ne^'u ba'c set bs=1024 se~ dde` le^n ca'i chua^?n cu?a > ca? 2 ibs va` obs. Ca'i na`o to^'t ho+n. Co' le~ to ho+n thi` to^'t > ho+n nhu+ng ddu+`ng to qua' :) > > The minimum block size is 512 bytes. Small block sizes increase > allocation overhead which decreases filesystem performance, but in > general, the recommended block size for filesystems under 100 MB > and for filesystems with many small files is 512 bytes. >[EMAIL PROTECTED]:~$ dd if=/dev/hdc of=HURD.iso bs=512
Hi! Co' su+. kha'c nhau giu+~a bs=512 / 1024 / 2048 : [EMAIL PROTECTED]:~$ dd if=/dev/hdc of=HURD.iso bs=512 dd: reading `/dev/hdc': Input/output error 584912+0 records in 584912+0 records out 299474944 bytes transferred in 148.832248 seconds (2012164 bytes/sec) [EMAIL PROTECTED]:~$ dd if=/dev/hdc of=HURD1.iso bs=1024 dd: reading `/dev/hdc': Input/output error 292456+0 records in 292456+0 records out 299474944 bytes transferred in 259.508378 seconds (1154009 bytes/sec) [EMAIL PROTECTED]:~$ dd if=/dev/hdc of=HURD2.iso bs=2048 dd: reading `/dev/hdc': Input/output error 146190+0 records in 146190+0 records out 299397120 bytes transferred in 251.309954 seconds (1191346 bytes/sec) [EMAIL PROTECTED]:~$ -- m k h _ s g n __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ VietLUG-users mailing list VietLUG-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vietlug-users
