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hdparm is a command line program for Linux to set and view ATA hard disk drive hardware parameters and test performance. [ 2 ] [ 3 ] It can set parameters such as drive caches, sleep mode, power management, acoustic management, and DMA settings.
ATA does not expose a low-level format functionality, but they allow the sector size to be changed via SET SECTOR CONFIGURATION (--set-sector-size in hdparm). (Consumer drives usually only support 512 and 4096-byte sectors.) Although sector-size change may scramble data, it is not a safe way of erasing data, nor is any certification done.
It can be used to create/remove Host Protected Area (HPA) (using command SET MAX) and create/remove DCO hidden area (using command DCO MODIFY). It also can do other functions on the DCO. Data Synergy's freeware ATATool utility can be used to detect a DCO from a Windows environment. Recent versions allow a DCO to be created, removed or frozen. [3]
The popularity of the PC beginning in the 1980s and the advent of the IDE interface in the late 1980s led to a 512-byte sector becoming an industry standard sector size for HDDs and similar storage devices. [11] [failed verification] In the 1970s, IBM added fixed-block architecture Direct Access Storage Devices (FBA DASDs) to its line of CKD ...
The IDENTIFY DEVICE command queries a particular register on the IDE controller to establish the size of a drive. This register however can be changed using the SET MAX ADDRESS ATA command. If the value in the register is set to less than the actual hard drive size then effectively a host protected area is created.
Image credits: blakelively “Excuse me,” Lively interjects. “My friend and I, when we were in the 10th grade, had crazy crushes, and we’d drive around and stalk these guys.
Feature set Sector Size (Default) Notes Information ST11950N/ND: 1 1993 1.69 GB ... There is a performance anomaly using hdparm with an NCQ queue depth of 31 in AHCI ...
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