<div>
You have to ADD this HDD as a hotspare from ACU.<br />
Format will be done by the system.<br />
<br />
Some/rare cases pulled out HDD will become faulty if pulled while working.<br />
But you can try adding again as hotspare.
</div>


You have to ADD this HDD as a hotspare from ACU.
Format will be done by the system.

Some/rare cases pulled out HDD will become faulty if pulled while working.
But you can try adding again as hotspare.

<div>
My stupid friend pulled it while working from this brand new, just-installed server. so hope the HDD in brand new condition with some data on it. so are you sure that if he add this disk again to the server and edit the existing raid5 to have this as hot spare and it will work?<br />
<br />
are you seure that in a future failure the hot spare disk (with exiting data) be erased before joined to the raid5 again?
</div>


My stupid friend pulled it while working from this brand new, just-installed server. so hope the HDD in brand new condition with some data on it. so are you sure that if he add this disk again to the server and edit the existing raid5 to have this as hot spare and it will work?

are you seure that in a future failure the hot spare disk (with exiting data) be erased before joined to the raid5 again?

<div>
Thanks for the confirmation
</div>


<div>
Do not forget to check the health of the HDD added.<br />
If it is not healthy it will not function as hotspare.
</div>


Do not forget to check the health of the HDD added.
If it is not healthy it will not function as hotspare.

<div>
<div class="content wysiwyg-content">
A friend got a new server with 8 HDDs, he created a raid5+1 hot spare. and installed the os. after that he wanted to test whether the hot spare would would and he pulled a disk from raid5. successfully the hot spare was added to the raid5 and rebuilt the raid5. <br />
<br />
Now the question is that the HDD he earlier pulled; he wants to put it back and use as the new hot spare. since there is some data in this HDD since it was participating in the raid5 earlier, will this work as hot spare? or else will he have to format this disk? if so, how to format? from ACU?
</div>
</div>


A friend got a new server with 8 HDDs, he created a raid5+1 hot spare. and installed the os. after that he wanted to test whether the hot spare would would and he pulled a disk from raid5. successfully the hot spare was added to the raid5 and rebuilt the raid5. 

Now the question is that the HDD he earlier pulled; he wants to put it back and use as the new hot spare. since there is some data in this HDD since it was participating in the raid5 earlier, will this work as hot spare? or else will he have to format this disk? if so, how to format? from ACU?

HP dl180 g9 - raid5 hot spare disk

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

RAID stands for Redundant Array of Independent Disks.

RAID is data storage technology that allows multiple drives to be used together as a single virtual drive for reasons such as fault tolerance, reliability and performance. 

There are several different levels of RAID that determine how the data is stored and the level of redundancy achieved across the drives.

RAID

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.