CLONING
Logicube ZXi-
10G™ User’s Manual
33
4.3.2 HPA/DCO
HPA/DCO is available in the following modes:
Drive to Drive
and
Drive to Image
.
An HPA or DCO configuration on a hard drive is designed to change drive characteristics such
as drive capacity, speed,
and other settings as they are reported to the computer’s BIOS
.
The HPA/DCO setting allows the user to set whether a drive’
s HPA or DCO is to be unlocked
and imaged. Select
YES
to unlock and image a Host Protected Area (HPA) or Device
Configuration Overlay (DCO).
HPA
–
If supported by the drive, HPA is set with the SET MAX ADDRESS command. The Host
Protected Area is an area of a drive that is normally not visible to an Operating System, BIOS,
or the user.
DCO
–
If supported by the drive, DCO is typically set by using the DCO MODIFY or DEVICE
CONFIGURATION SET command. The Device Configuration Overlay limits the size of a drive
only. For example, a 160GB drive can be made to look like a 100GB drive to a computer. Like
HPA, this hidden area is normally not visible to an Operating System, BIOS, or the user.
ACS3
–
If supported by the drive, this is set using the ACCESSIBLE MAX ADDRESS command as
specified by the ATA/ATAPI Command Set. This is the maximum LBA that is accessible by read
commands and write commands that return command completion without error.
4.3.3 Error Handling
Error Handling is available in all modes. When bad sectors are encountered on the Master
drive, the unit can either
skip
the bad sectors or
abort
the imaging operation. This allows
flexibility on what to do when bad sectors are found on the Master drive.
When bad sectors are encountered, and error
handling is set to
Skip
, the unit will write a zero on the
corresponding sector or position in the Target drive.
There is also has a setting for error granularity. There are 3 options:
•
1 sector (512 Bytes)
•
4096 Bytes (8 sectors)
•
64 KIB (128 sectors)
When a bad sector on the Master drive is found, by default, it will skip that sector. Changing
the granularity allows more sectors to be skipped.
A cluster size represents the smallest amount of disk space that can be used to hold a file. The
most common cluster size for an NTFS volume, for example, is 4KB (4096 Bytes). This means
that the smallest amount of space that will be used for a file is 4096 Bytes.
As an example, if 4096 Bytes is chosen, and one of the 8 sectors in that cluster size contains a
bad sector, the unit will skip the entire cluster (or 4096 bytes or 8 sectors).
