Detailed information about ATA disk drives, HDD temperature,
HDD health status, transfer modes and HDD
HDD Model: HDD vendor and
model read from IDE-controller.
HDD Default Size: Real HDD
size read from the IDE-controller. Due to the two different ways of
defining 'megabyte' your hard disk capacity can be calculated in
two different ways: after calculating the number of bytes in the
formula heads*sectors*cylinder*512-bytes-per-sector you may get the
result in the unit 'megabyte' by dividing either by 1024*1024 (like
in the BIOS of the computer does) or by 1000*1000 (like the
producers of hard disks do).
ATA device interface type (Parallel ATA, Serial ATA I, Serial ATA
II, Serial ATA III)
Geometry: Logical number of
heads, sectors per track and tracks while CHS addressing. It has
nothing to do with physical HDD parameters.
Compatibility of this device with the specific ATA/ATAPI
Serial Number: HDD unique
Controller Revision: Number
of the revision returned by the IDE-controller.
HDD Marketing Size: The
marketing size much more than real size. In one 'computer' megabyte
of 1048576 bytes, but in one 'marketing' (used by HDD
manufacturers) of 1000000 bytes.
Buffer Size: Buffer size of
the IDE-controller (you shouldn't mix it up with disk cache). Part
of the buffer can be used for system
purposes, and its real size can be smaller. Some hard disks don't
provide information on the buffer size.
Buffer Type: Internal
buffer type of the IDE-controller. Possible values - 'Not
specified', 'Single ported single sector buffer', 'Dual ported
multi-sector buffer', 'Dual ported multi-sector buffer with a read
HDD Temperature: Current
temperature of HDD.
Reallocated Sectors: Number
of reallocated sectors.
HDD Health Status: Can be
one of four values:
Host Writes: Total size of
data written to SSD disk by the host system.
Host Reads: Total size of
data read from SSD disk by the host system.
ECC bytes: Number of
Security Erase Time:
Security Erase Time (in minutes).
Enh. Security Erase:
Enhanced Security Erase (in minutes).
Current APM Value: Current
Advanced Power Management Value.
Current value of the automatic acoustic management (recommended -
value recommended by vendor) and status (enabled/disabled).
ATA Controller Vendor:
Vendor of ATA controller
ATA Controller Name: Name
of ATA controller
Device Location: Device
location on the ATA controller
PIO Mode Support: PIO
(Programmed Input/Output) is a way of moving data between device in
a computer in which all data must pass through the processor. The
higher the number is, the higher the data transfer rate is (For PIO
mode 4 - 16.6 MBps).
SW DMA Mode Support: Number
of the supported single word DMA mode. Active: SW DMA mode currently enabled by
MW DMA Mode Support: DMA
(Direct Memory Access) is a transfer protocol where a peripheral
device transfers information directly to or from memory, without
the system processor being required to perform the transaction.
Apart from the previous mode, single word DMA modes can be
supplanted by multiword DMA modes. Active: MW DMA mode currently enabled by
UDMA Mode Support: Number
of the UltraDMA mode. Theoretical transmission speed for UltraDMA
mode 2 is 33 MB/s, mode 5 - 100 MB/s. Some chipsets don't support
UltraDMA mode (for example, chipsets i430VX and lower don't support
it while i440BX supports only mode 2). Active: UltraDMA mode currently enabled by
Sectors per Interrupt:
Number of sectors that can be transferred per interrupt in a block
mode. Active: Current numbers of sectors per interrupt.