Ngokwalokhu okulotshwe ngezansi, liyini ibhulokhi?
Context:Ibhulokhi (ukugcinwa kwedatha)  Ekubaleni (ikakhulukazi ukudluliswa kwedatha nokugcinwa kwedatha), ibhulokhi, ngezinye izikhathi ebizwa ngokuthi irekhodi lomzimba, liwukulandelana kwama-byte noma ama-bit, ngokuvamile aqukethe inani eliphelele lamarekhodi, anobude obukhulu; usayizi webhulokhi. Idatha ehlelwe kanjalo kuthiwa ivinjelwe. Inqubo yokufaka idatha emabhuloki ibizwa ngokuthi ukuvimba, kuyilapho ukuvula ukuvimba kuyinqubo yokukhipha idatha emabhuloki. Idatha evinjelwe ngokuvamile igcinwa ku-buffer yedatha, futhi ifundwe noma ibhalwe ibhulokhi lonke ngesikhathi. Ukuvimba kunciphisa izindleko futhi kusheshise ukuphathwa kokugeleza kwedatha. Kwamanye amadivayisi, njengamadivayisi e-tape kazibuthe namadivayisi e-CKD disk, ukuvimba kunciphisa inani lokugcina okudingekayo ngaphandle kwedatha. Ukuvimbela kusetshenziswa cishe yonke indawo lapho kugcinwa idatha ku-9-track tape magnetic, inkumbulo ye-NAND flash, nemidiya ejikelezayo efana nama-floppy disk, ama-hard disk, nama-optical disk.  Izinhlelo eziningi zamafayela zisekelwe kudivayisi yebhulokhi, okuyizinga lokukhishwa kwe-hardware elibhekele ukugcina nokubuyisa amabhulokhi wedatha acacisiwe, yize usayizi webhulokhi ezinhlelweni zamafayela ungaba yiziningi zosayizi webhulokhi ebonakalayo. Lokhu kuholela ekungasebenzini kahle kwesikhala ngenxa yokuqhekeka kwangaphakathi, ngoba ubude befayela kaningi akuzona iziphindaphindo eziphelele zobukhulu bebhulokhi, ngakho-ke ibhulokhi lokugcina lefayela lingahlala lingenalutho. Lokhu kuzokwenza kube nesikhala esincane. Ezinye izinhlelo ezintsha zamafayela, njenge-Btrfs ne-FreeBSD UFS2, zizama ukuxazulula lokhu ngokusebenzisa amasu abizwa ngokuthi ukuhlukaniswa kwebhulokhi nokuhlanganiswa komsila. Ezinye izinhlelo zamafayela ezifana ne-ZFS zisekela osayizi bamabhulokhi abaguquguqukayo.  Ukugcinwa kwe-block kuvame ukuhlukaniswa ngohlelo lwefayela noma uhlelo lokuphathwa kwedatha (i-DBMS) ukuze lusetshenziswe yizinhlelo zokusebenza nabasebenzisi bokugcina. Imithamo ebonakalayo noma enengqondo efinyelelwa nge-block I / O ingaba amadivayisi angaphakathi kuseva, axhunywe ngqo nge-SCSI noma i-Fibre Channel, noma amadivayisi akude afinyelelwe ngenethiwekhi yendawo yokugcina (i-SAN) kusetshenziswa inqubo efana ne-iSCSI, noma i-AoE. I-DBMSes ivame ukusebenzisa i-block I/O yayo ukuze ithuthukise ukusebenza nokululama uma kuqhathaniswa nokubeka i-DBMS ngaphezulu kohlelo lwefayela.
Ekubaleni - futhi ikakhulukazi ekudlulisweni kwedatha nasekugcinweni kwedatha - ibhulokhi iyinhlanganisela yama-byte noma ama-bit aqukethe inombolo yamarekhodi futhi anobude obukhulu. Ukufaka idatha emabhuloki kubizwa ngokuthi ukuvimba, futhi kunciphisa izindleko futhi kusheshise ukuphatha ukugeleza kwedatha. Ukugcinwa kwe-block kuvame ukuhlukaniswa ngohlelo lwefayela noma uhlelo lokuphathwa kwedatha ukuze lusetshenziswe yizinhlelo zokusebenza nabasebenzisi bokugcina.