Hello, dear!
Good day to you!
In this post, I will show you how to replace the disks and enclosures of the IVS1800.
IVS1800 hard disk and RAID
The IVS1800 has three types of disks: idle disk, data disk, and system disk. The idle disk, as its name suggests, did not work. The data disk is used to store recording files, and the system disk is used to store configuration files.
Data disk
Data disks have three disk modes: Non-RAID mode, RAID 5 (recommended configuration), and RAID 5 (economical configuration).
In non-RAID mode, data on the faulty hard disk will be lost after the faulty hard disk is replaced.
In RAID 5 (recommended configuration)
if there is only one faulty disk, data will not be lost after the disk is replaced.
If two faulty disks are faulty at the same time, data on both disks will be lost. If both hard drives do not fail at the same time, no data will be lost.
If there are more than two faulty disks, data on all faulty disks will be lost.
In RAID 5 (economical configuration)
If there is only one faulty disk, data on the faulty disk will not be lost.
If there is more than one data disk, data on the faulty hard disk will be lost.
System disks
In non-RAID or RAID 5 mode, the two hard disks with the smallest slot IDs have system RAID partitions in RAID 1 mode.
If the hard disk where the system RAID is located is also faulty, replace the faulty hard disk.
In RAID 5 mode, the system cannot run properly. You need to format all hard disks and then reconfigure the hard disk RAID.
In Non-RAID mode, live video services can still be used, but data safe cannot be used to restore services.
If the hard disks where the two system RAID partitions reside are faulty in sequence, the system automatically backs up the system RAID partitions to the hard disk with the smallest slot ID.
For example, the system RAID partitions reside on the hard disks in slots 0 and 1. If the hard disk in slot 0 is faulty, the system RAID partition is automatically backed up to the hard disk in slot 2.
Replace the disk
1. Locate the faulty hard disks.
a. Log in to the OMU portal as the admin user.
b. Choose Storage > Disks > View.
c. Check the RAID group status and record the slot numbers of the faulty hard disks.
2. Replace the faulty hard disks.
a. Wear an ESD wrist strap and connect the ground terminal of the ESD wrist strap to the ESD jack in the cabinet or on the workbench.
b. Power off the device and remove the power cable.
c. Replace the faulty hard disks with new hard disks by slot ID. Replacing a hard disk involves removing the faulty hard disk and installing a new hard disk.
d. Power on the device.
You need to turn on the power switch, and do not need to press the Power button.
3. After replacing the hard disk, check whether the hard disk status indicator on the front panel of the device is normal.
4. Check whether the recording service is normal. (only one system disk is faulty)
Check whether the RAID group status and disk status are normal. For details, see step 1.
5. Reconfigure the RAID group. (both system disks are faulty)
a. Log in to the OMU portal as the admin user.
b. Choose Storage > Disks.
c. Click Forcibly Format.
When the formatting is complete, the device automatically restarts.
d. Log in to the OMU portal again and initialize disks.
6. Manually back up data. (both system disks are faulty)
a. Log in to the OMU portal as the admin user.
b. Choose Maintenance > Data Safe.
c. Click Full Backup.
Replace a subrack
Please use the same type and model subracks.
You can view the device model on the electronic label attached to the chassis, for example, IVS1800-C08-04T(64Channel).
The impact of subrack replacement for the same device model is as follows:
If the electronic label is changed from IVS1800-C08-04T(64Channel) to IVS1800-C08-04T(32Channel), the maximum number of cameras that can be connected to decreases to 32 after data restoration.
The impact of subrack replacement for different device models is as follows:
If the electronic label is changed from IVS1800-C08-04T to the IVS1800-C08-16T or IVS1800-C08-32T, services are interrupted after data restoration and the reverse is also true.
If the electronic label is changed from the IVS1800-C08-32T(64Channel) to IVS1800-C08-16T(64Channel), the intelligent service specifications decrease after data restoration, and the reverse is also true.
1. Wear an ESD wrist strap and connect the ground terminal of the ESD wrist strap to the ESD jack in the cabinet or on the workbench.
2. Perform the following operations on the original subrack.
a. Turn off and unplug the original subrack to ensure that the subrack is powered off.
Removing a hard disk when the server is powered on may cause data loss on the hard disk.
b. Remove hard disks. Remember the slot ID of each hard disk. You need to install the hard disk to the same slot in the new subrack.
3. Perform the following operations on the new subrack.
a. Install the removed hard disks into the same slots in the new subrack
b. Connect the power cable of the new subrack and turn on the power switch on the rear panel to power on the new subrack. Do not connect the network cable.
d. Start the LDU and reset the passwords of the service system and operating system accounts.
e. Log in to the LDU to restore data.
When a message is displayed asking you whether to restore the disk data, click OK.
The PWR indicator on the front panel turns from steady yellow to steady green, and the buzzer produces three beeps (for 3 seconds in total). In this case, the data restoration is complete.
f. Connect the network cable to the network port of the device and ensure that the device is connected to the network properly.
Hard Disk Expansion(OMU portal)
In the non-RAID disk capacity expansion scenario, if the number of disks before capacity expansion is 1, the system partition exists in RAID 0 mode on the disk. After the disk capacity expansion is successful, the system partition still exists in RAID 0 mode. When the hard disk where the system partition is located is faulty, the device cannot run properly.
1. Install the new hard disk
a. Wear insulation gloves and connect the ground terminal of the ESD wrist strap into the ESD jack in the cabinet or on the workbench.
b. Power off the device.
c. Install the new hard disk.
d. Power on the device.
e. Check whether the hard disk status indicator on the front panel is normal.
2. Add the new hard disk to the original RAID group. (add disks in non-RAID mode.)
a. Log in to the OMU portal.
b. Choose Storage > Disk.
It takes about two minutes to display the hard disk status on the OMU portal after the new hard disk is installed. The drive letter in gray shading is the new hard disk.
c. Click Expand RAID Group Online to add the new hard disk to the original RAID
It takes about 5 to 10 minutes for hard disk capacity expansion.
After the capacity expansion is complete, the state of the new hard disk changes from Idle disk to Member Disk.
Hard Disk Expansion(LDU)
In the non-RAID disk capacity expansion scenario, if the number of disks before capacity expansion is 1, the system partition exists in RAID 0 mode on the disk. After the disk capacity expansion is successful, the system partition still exists in RAID 0 mode. When the hard disk where the system partition is located is faulty, the device cannot run properly.
1. Install the new hard disk
a. Wear insulation gloves and connect the ground terminal of the ESD wrist strap into the ESD jack in the cabinet or on the workbench.
b. Power off the device.
c. Install the new hard disk.
d. Power on the device.
e. Check whether the hard disk status indicator on the front panel is normal
2. Add the new hard disk to the original RAID group.
a. Log in to the LDU as the admin user.
b. Click 
in the upper left corner to access the main menu.
c. Choose System Management > Disk Configuration.
It takes about 2 minutes for the LDU to read the hard disk status after the new hard disk is installed.
d. Click 
in the upper right corner of the page and find the hard disk whose Attribute is Idle disk (namely the new hard disk).
e. Add the new hard disk to the original RAID
It takes about 5 to 10 minutes for hard disk capacity expansion.
f. After the capacity expansion is complete, click 
in the upper right corner of the page, and check whether the Attribute of the new disk in the disk list changes from Idle disk to Data disk.
That is all, thanks for reading!
