what is disk defragmenter

what is disk defragmenter .What is Floppy Disk?用英语 Disk what is hard disk用纯英文的,最好有翻译这个英语太专业了，麻烦帮忙翻译下 A uniform disk with mass 41.8kg and radius 0.280m is pivoted at its center about a horizontal,frictionless axle that is stationary.The disk is initially at rest,and then a constant force 28.0N is applied tangent to the rim of the disk.1.What is the m information is s___ on the hard disk. No stand-alone disk and No usable disk array attached ,please check if any disk array is broken,翻 No stand-alone disk and No usable disk array attached ,piease check it any disk array is broken 英语翻译我这样翻译可以吗？The RAID volume has been created and disk synchronization is doing.If install OS at this time,What problem will occur? l________ is stored on a floop disk or a hard disk your hard disk is too fragment,youshould uninstall recovery genius and defrag your disk other removable disk this is not available什么意思 Disk manager found 1drive.is thedrive List correct是什么意思 information is s_____ on the hard disk or on a floppy disk 填个以s开头的单词 disk是什么意思 disk是什么意思 optical disk hard disk