Product specifications

Infortrend
A-4
Bad Block Handling
in degraded mode
A method for handling low quality drives. The
operation is performed on both the logical drive in
degraded mode or that being rebuilt. If bad blocks
should be encountered during Rebuild, Add Drive,
Host Write, or Regenerate Parity operation, the
controller will first attempt to reconstruct affected
data and those unrecoverable bad blocks are
stated as bad and passed to host.
Users have the option to abandon data on the
unrecoverable sectors to continue rebuild in a
degraded mode.
Low quality drive handling comes with transparent
resetting of hung hard drives.
Transparent reset of
hung HDDs
Supported
Auto cache flush on
critical conditions
(caching mode
dynamic switch)
When critical conditions occur, e.g., component
failure, or BBU under charge, cached data will be
flushed and the write policy will be changed to
write-through mode.
Configurable “Trigger Events” for Write-
through/Write-Back Dynamic Switch. The
configuration can also be set with the Oem
“Iappend” utility.
Drive low-level
format
Supported
RAID parity update
tracking and
recovery
Yes
Host-side Ordered
Tag support
Supports write commands with embedded Ordered
Tags
Drive identification
(flash drive function)
Supported. Force a drive to light on its activity
indicator for users to recognize its location
Drive information
listing
Supported. Drive vendor name, model number,
firmware revision, capacity (blocks), serial number,
narrow/wide and current sync. speed
Drive read/write test
Supported
Configuration on
disks
Supported. The logical drive information is
recorded on drive media. The logical drives can
still be accessed if using different Infortrend RAID
controllers/subsystems, e.g., drives removed and
installed in a different subsystem.
Save/ restore
NVRAM to / from
disks
Supported. Save all the settings stored in the
controller NVRAM to the logical drive members
Save / restore
NVRAM to / from a
file
Supported. Save all the settings stored in the
controller NVRAM to a file (via GUI manager) on
user’s computer
Host-side 64-bit LBA
support
Supports array configuration (logical drive, logical
volume, or a partition of them) of a capacity up to
64TB.