How to Recover Data from RAID 5, RAID 6, and RAID 0 Arrays Created on a Dell PERC H700 Controller

⭐⭐⭐⭐⭐ This video covers the most common causes of data loss, including accidental file deletion, formatting, RAID configuration corruption, controller failure, and hard drive failure.
You'll learn how to connect the drives directly to a computer, automatically or manually reconstruct the RAID array, and recover your data using specialized data recovery software.

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👉 Hetman Partition Recovery - https://hetmanrecovery.com/hard-drive-data-recovery-software
👉 Hetman RAID Recovery - https://hetmanrecovery.com/raid-data-recovery-software
👉 How to recover data from RAID5, RAID6, and RAID0 arrays created on a Dell PERC H700 controller - https://hetmanrecovery.com/recovery_news/how-to-recover-data-raid5-raid6-raid0-dell-poweredge-r710-perc-h700

📚 Content:
00:00 - Intro
01:40 - Dell PERC H700 Controller Features
02:49 - Recovering Files from a RAID Array
06:56 - Connecting the Drives
10:27 - Automatic RAID Detection
14:20 - Manual RAID Reconstruction
20:18 - Conclusion

🔷RAID Systems: Definition, Types, How to Create One and Recover Lost Data - https://www.youtube.com/playlist?list=PLWfvrWYvsWiJznrhRlxOKYd40Z1sOP2Vf

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Other videos: #Dell #PERC_H700 #RAIDRecovery #RAID0 #RAID5 #RAID6 #DataRecovery #HardwareRAID #ServerRecovery #ITSupport #DellServer #EnterpriseIT

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Closed Caption:

Hello. In this video, we'll show you how
to recover data from RAID zero, RAID 5,
and RAID six arrays created on a Dell
Perk H700 controller in a Dell Power
Edge R710 server. We'll cover three
categories of recovery scenarios. The
first category involves logical errors
such as accidentally deleting files,
formatting a RAID array, or deleting
partitions from the discs that make up
the array. The second category covers
RAID configuration loss, where the array
disappears from file explorer after the
RAID configuration is accidentally
recreated or reset through the RAID
controllers management utility. The
third category includes hardware
failures [music]
such as a failed RAID controller or
motherboard, simultaneous failure of
multiple drives, firmware update
failures, unsuccessful RAID level
migration or array expansion, as well as
accidental overwriting of RAID service
information. In the practical part of
this video, you'll learn how to diagnose
the condition of a RAID array, connect
the drives directly to a computer while
bypassing [music] the RAID controller,
and identify the key RAID parameters
required for manual reconstruction,
including the drive order, stripe
[music] size, and offset using
specialized recovery software. The
recovery methods and software
demonstrated in this video are universal
and can be used not only on Windows
systems but also on Linux and Mac OS.
[music]
Dell Perk H700 controller features. The
Dell Perk H700 is an enterprise class
hardware RAID controller that supports
both SAS and SATA interfaces with data
transfer speeds of up to 6 Gbits per
second. The controller is equipped with
six internal ports and when used
together with a SAS expander supports up
to 32 drives. The maximum RAID array
capacity can reach 64 terabytes.
Depending on the configuration, it
includes either 512 megabytes or 1 GBTE
of cache memory. A battery backup unit
BBU protects the cache contents in the
event of a power failure. The controller
supports RAID zero, RAID one, RAID 5,
RAID 6, and RAID [music] 10. Works with
both HDDs and SSDs. installs into a PCI
Express X8 slot and is compatible with
Windows Server, Linux, and VMware ESXi.
Its key features include hot swappable
drive support, background
initialization, patrol read, and
automatic RAID rebuild, [music]
recovering files from a RAID array. In
this part of the video, we'll walk
through the recovery process after
accidental file deletion or RAID array
formatting. Most often, users lose data
after accidentally pressing shift
delete, emptying the recycle bin,
completely formatting a raid array, or
deleting partitions directly from the
discs that make up the array. To recover
deleted data in these situations, you
can use Hetman Partition Recovery.
[music] This professional data recovery
solution can scan a raid array, locate
lost files, and restore them with
maximum accuracy while preserving the
original folder structure. You'll find
the download link in the description
below this video. As an example, we'll
recover data from a RAID zero array
consisting of two drives connected to a
Dell Perk H700 controller running
Windows 11. The recovery procedure for
RAID 5 and RAID 6 arrays is identical.
After launching Hetman partition
recovery, [music] the program
automatically analyzes all connected
storage devices and displays the RAID
array on the main screen showing its
RAID level, total capacity, and file
system. If you only need to recover
accidentally deleted files, select fast
scan. In this mode, the program quickly
analyzes the file system metadata and
directory structure, detects deleted
files, and determines if they can be
recovered. Once the scan is complete,
you'll see a list of all detected files
along with a preview feature that allows
you to verify their integrity before
recovery.
Next, simply select the files you want
to restore and click recovery.
The program will save the recovered data
to the selected location while
preserving the original folder structure
and all file attributes.
If the raid array has been formatted or
its partitions have been deleted, use
full scan instead. In this mode, the
program performs a deep sector by sector
scan of the entire RAID array, allowing
it to recover the maximum possible
amount of data, even if the file system
has been partially damaged. This makes
it possible to recover all available
data that was stored on the array before
formatting with the highest possible
accuracy.
Before starting the recovery process,
make sure the destination drive has
enough free space to store the recovered
data. During a full scan, Hetman
Partition Recovery may detect a large
number of files, including ones that
were deleted long ago. To avoid
interrupting the recovery process and to
ensure that all recovered data is saved
together with the original folder
structure, we recommend using a separate
external drive or another healthy RAID
array with sufficient free capacity.
Connecting the drives. Successful data
recovery requires the minimum number of
healthy drives that originally belonged
to the RAID array. The number of
available drives directly affects
whether the array can be reconstructed
and how much data can be recovered.
Therefore, before starting the recovery
process, [music] it's important to
assess the condition of every drive. For
RAID zero, all drives are required
without exception since data is evenly
distributed across every drive in the
form of striped blocks. The loss of even
a single drive makes recovery impossible
since RAID zero contains no redundancy
that can be used to reconstruct missing
data. For RAID 5, the minimum required
number of drives is one less than the
total number of drives in the array.
This RAID level provides fault tolerance
against the failure of any single drive
by using distributed par. Although
reconstruction is possible with one
missing drive, having the complete set
of drives significantly increases the
chances of successful recovery and makes
automatic RAID reconstruction much
easier. For RAID 6, you need at least
two fewer drives than the total number
of drives in the array. Thanks to its
dual par algorithm, RAID 6 can continue
operating even if two drives fail
simultaneously. For this reason, RAID
[music] 6 is considered the most fault
tolerant RAID level covered in this
video and offers the highest probability
of successful data recovery after
serious hardware failures. After
removing the drives from the server, you
can connect them directly to your
computer's motherboard using standard
SATA cables or an external docking
station. To connect SAS drives, you'll
need a compatible SAS controller since
standard SATA ports do not support SAS
devices. Do not initialize or format the
drives, even if the operating system
prompts you to do so, as this may
overwrite the RAID metadata and
significantly reduce the chances of
successful data recovery. Before
removing the drives from the server,
it's also highly recommended to label or
record their original order, as this
will greatly simplify the RAID
reconstruction process later. If it's
physically impossible to connect all the
drives, you can use an alternative
approach by creating disk images of one
or more unavailable drives and mounting
those images in the program. To do this,
launch the program, select the drive you
want to create an image of, and click
save disk. In the window that opens,
specify the location where the disc
image should be saved.
After the image has been created, return
to the program's main window and click
mount disk at the top of the window.
In the dialogue box that appears, select
raw disk images. [music] Then specify
the path to the image file you created.
The image will be mounted together with
the remaining drives in the RAID array,
allowing you to continue the recovery
process as usual. Automatic [music] RAID
detection. Now, let's look at the
recovery procedure when the server
itself or one of its hardware components
such as the RAID controller or the
motherboard has failed. These types of
hardware failures are among the most
common reasons for losing access to a
RAID array because the operating system
can no longer detect the logical volume.
This category also includes physical
failure of one or more drives as well as
critical failures during a RAID
controller firmware update that result
in the loss of the RAID configuration.
To recover data in these situations, we
recommend using Hetman RAID recovery.
This software is specifically designed
to automatically reconstruct damaged
RAID arrays and recover data even when
the original RAID controller is no
longer available. After launching the
program, it automatically detects the
connected drives as members of a RAID
array and reconstructs the array without
requiring any Windows RAID management
tools. You'll find the download link in
the description below this video. As an
example, let's recover data from a RAID
5 array consisting of three drives. The
recovery procedure for RAID zero and
RAID 6 is identical. After launching
Hetman RAID recovery, the program
automatically analyzes all connected
storage devices, [music]
reconstructs the RAID array, and
displays it on the main screen showing
the RAID level, total capacity, and file
system. To begin searching for data,
select the detected RAID array and run
fast scan. In this mode, the program
quickly analyzes the file system
metadata and directory structure,
detects deleted files, and determines
whether they can be recovered.
Once the scan is complete, the program
displays all recoverable contents of the
RAID array.
If necessary, use the preview feature to
verify the integrity of the detected
files before restoring them.
To complete the recovery process, select
the files and folders you want to
restore, then click recovery on the
toolbar at the top of the main window.
In the dialogue box that appears,
specify a safe location on another
healthy storage device and confirm the
operation. The program will recover the
data while fully preserving the original
folder structure and all file
attributes. After the copying process is
complete, click finish. Your recovered
files will once again be available to
use.
if the program cannot automatically
detect the RAID arrays file system or if
fast scan does not produce the expected
results. Switch to full scan in Hetman
RAID recovery. Before starting the full
scan, you can specify the file systems
that were previously used on the RAID
array. This allows the program to
perform a deeper and more accurate
analysis. Manual RAID reconstruction. If
your data was lost during RAID
migration, array expansion, deletion of
the RAID configuration, or as a result
of accidentally overriding RAID
metadata, for example, after
initializing a disk, creating new
partitions, [music] or installing an
operating system on the RAID drives, use
the built-in RAID constructor tool
included with Hetman RAID recovery. This
tool allows you to manually recreate the
original RAID configuration and regain
access to your data even after
accidental disk initialization or an
unsuccessful operating system
installation.
Let's look at a practical example of
recovering a RAID 6 array consisting of
four drives where two drives have failed
simultaneously.
Thanks to RAID 6's dual parody
protection, the data can still be
recovered successfully. However, this
requires recreating the original RAID
configuration as accurately as possible.
The recovery procedure for RAID zero and
RAID 5 arrays is the exact same. To use
RAID constructor, you need to know the
main RAID parameters that were specified
when the array was originally created.
RAID level, block order, stripe size,
sector size. For the Dell Perk H700
controller, the following default values
are used in most configurations.
Block order left synchronous, stripe
size 64 kilob, sector size 512 bytes. In
addition, this controller supports the
following stripe sizes: 8 kilob, 16
kilob, 32 kilob, 64 kilob,
128 kilob, 256 kilob, 1 megabyte, and 1
megabyte. Keep in mind that these values
may vary depending on the specific RAID
configuration. If necessary, they should
be verified or determined manually. In
the available discs pane, select the
drives that belong to the RAID array and
move them to the selected discs [music]
pane while preserving their original
order. If one of the drives is
physically missing or has failed, use
the add empty disc option to insert a
virtual placeholder in its place.
Maintaining the correct drive order
[music] is critically important because
an incorrect sequence will make proper
RAID reconstruction impossible.
After completing the configuration,
click add to add the reconstructed RAID
array to the program's main window. If
some RAID parameters are unknown, you
can determine them by trying the
available options provided by the
program. While configuring the array,
pay close attention to the preview
displayed in the reconstructed RAID
window. If all parameters have been
entered correctly, the program will
detect the partitions, identify the
correct file system, and display a
readable folder structure. This is the
primary indication that the RAID
configuration has [music] been
reconstructed correctly and that the
data is ready for analysis. You can also
use the detect automatically feature. In
this mode, the program automatically
tests different combinations of RAID
parameters, including drive order,
stripe size, and offset that could
potentially match the original RAID
configuration. This makes it possible to
determine the correct RAID parameters
even when no information about the
original configuration is available.
Keep in mind that automatic detection
usually takes longer than manually
entering the RAID parameters. However,
it becomes indispensable when all
information about the RAID configuration
has been lost.
Once the reconstructed RAID array
appears in the list of available
devices, you can proceed with scanning
it.
If the only issue was damage to the RAID
configuration, begin with fast scan. The
program will analyze the metadata and
display the folder structure along with
the available files.
If necessary, use the preview feature to
verify the contents of the detected
files before recovering them.
Heat. Heat.
If the results of the quick scan are
unsatisfactory or the file system has
been severely damaged, run full scan.
After the scan is complete, select the
folders and files you want to recover.
Then click recovery.
In the next dialogue box, specify the
destination where the recovered data
should be saved and confirm the
operation by clicking recovery. Once
[music] again,
after the recovery process is complete,
the program will notify you that the
data has been successfully [music]
restored.
In this video, we've demonstrated
practical methods for recovering data
from RAID zero, RAID 5, and RAID 6
arrays created on a Dell Perk H700
controller. If you found this video
helpful, please click like and subscribe
to the Hetman Software channel so you
don't miss our future videos. If you
still have any questions, leave them in
the comments below the video and we'll
be happy to answer each one. Thank you
for watching. We hope your data always
remains safe.
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