> I don't know anything about the internals of hdparm, and you can read > the man page as well as I can. When I looked into the man page it says –write-sector to write zeros into the specified sector. The same man page says that NOT to use this option. That is the reason I am asking here. > What version of Linux are you using? I am using the 2.6.32 and 2.6.32-rc6 which are checked out from Sarah Sharp git >And which scheduler? CFQ. >Some people have found that the default scheduler (CFQ) leads to worse I/O > performance than other schedulers. See > https://lists.one-eyed-alien.net/pipermail/usb-storage/2010-January/004970.html This link says low performance occurs for copyng of multiple files. But I am always testing with single large ZIP / TAR files. Still low performance Thanks in Advance, RD -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
