Meanining of Cache Flush / Dirty Cache messages
exacqVision Server
This typically means that the RAID controller lost power/battery power during a write operation.
The RAID controller contains a small buffer for data being written to the hard drives. When the write has been confirmed, the cache is cleared.
If the machine lost power, this is a normal message, and is not of concern.
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ExacqVision Drive is Offline
Meaning of Drive is Offline message. This could be seen in Storage or in system logs.
ExacqVision Server
This message could be the result of many underlying causes. It is possible the physical drive connection has failed, or a drive has been removed manually.
This could also result if something interferes with our attempt to get the status of the drive, as in the case of overly stringent antivirus or group policies applied to the system.
More troubleshooting is needed.
ExacqVision Corrupt Backup GPT Table or GPT Header
Meaning of Corrupt Backup GPT Table or GPT Header message
ExacqVision Server
Similar to a ‘Bad Superblock’, this metadata information about a partition can normally be restored without losing data.
Run ‘gdisk’
See Knowledge Base Article #7812 “Using gdisk to Fix Backup GPT Table Errors in Linux”
LSI Storage Authority (LSA) Installation Screenshots – Windows
LSI Storage Authority v007.019.006.00 Windows installation screenshots.
MegaRAID
How to Identify the MegaRAID Controller Model on an exacqVision Server
For various reason you may need to determine the model number of the RAID Controller Card.
Open a Command Prompt as Admin and run
"c:\Program Files (x86)\MegaRAID Storage Manager\storcli.exe" /c0 show all | findstr ModelOpen Terminal and run the following command
sudo storcli /c0 show all | grep ModelExacq Support has identified an issue with SMART attribute labels causing false positive drive offline errors on the hardware tab of ExacqVision Client.
Some systems may contain drives that get listed as “sat” instead of “ata” or “scsi” per smartctl -j -scan queries. This labeling causes the Hardware Tab of ExacqVision Client to show some drives offline, though data can be written to and retrieved from this drive.
-ExacqVision Server 22.12.2.0 – ExacqVision Server 23.06.2.0
Drives should remain with status of “Healthy” on hardware tab after update.
Select Drives may show false positive error/status of “Offline”
Update to ExacqVision server 23.09.102 or higher which contains fix for this issue.
Volume and hardware tabs are missing from the storage page after running the command from the hardening guide and choosing “Yes” to de-elevate.
sudo dpkg --reconfigure -p low edvrserverTo resolve this issue:
Start with a working exacqVision Server that has not been de-elevated.
Note: if you have previously run the Hardening/de-elevating command and the volume and hardware tabs are missing then you must first purge and re-install exacqVision Server before performing these instructions.
cd ~/Downloadsunzip 007.1912.0000.0000_Unified_StorCLI.zipcd Unified_storcli_all_os/Ubuntusudo dpkg -i storcli_007.1912.0000.0000_all.debsudo dpkg --reconfigure -p low edvrserverBoth the Volume and Hardware tabs should now be present in the exacqVision Client
See https://trac.exacq.com/DVR/ticket/23268#ticket for additional details.
The Volume and Hardware tabs or not present on the Storage page even though the server has a MegaRAID RAID controller and the drive is present on the Drive tab.
This can occur when the path to storcli is not present in the Windows system Path environmental variable. Use the following steps to correct.
Before troubleshooting an exacqVision system that is experiencing throttling, it is important to know how the software writes video to the disk.
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Each time PSFPI attempts to open a record stream, the disk volumes are checked for available space. The available space is determined by adding 1GB to the currently used space. The volume with the most space available is selected for storage. For example, Drive E: would be chosen in the following Windows environment:
C: (unused)
D: 98% full
E: 97% full
F: 98% full
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Note that, if all volumes are equally full, the oldest video is deleted to make room for the new video.
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A unique problem arises if changes are made to the system’s available drives. For example, suppose you add a drive in the previous example:
C: (unused)
D: 98% full
E: 97% full
F: 98% full
G: 0% full
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All video is then saved to drive G: until it is 97% full. However, if the system was already taxing the available I/O for drives D:, E:, and F:, it could overtax the new drive and result in throttling.
Additionally, after the new drive fills up, it contains all the video for a large span of time; this means that the video it contains will eventually all be the oldest video, and this problem will recur in an endless loop. Then, if cameras are added to a system at a later date, the system could exceed its available I/O.