Exchange 2016 Hard Drive partition

I am planning to install exchange 2016 in a VM. I do not plan to install the edge transport role, but only the mailbox role.  What is the best practice in regards to configuring the harddrives?
1. should I just have 1 drive and have the OS, database and logs on one drive, or
2. have 1 drive for the OS and 1 drive for the database and logs or
3. have 3 separate drives, 1 for the OS, 1 for the database and 1 for the logs

I am running scale computing, so the host servers are running on linux, and the hosts manage the data blocks whether  they are written to a platter drive or an SSD.  I have both platter drives and SSD in my host servers.
DanNetwork EngineerAsked:
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8046586Commented:
To get into the BIOS o that model you need a pin and you have to click it into the tiny hole next to the SD Card reader at the left side. The second option should be BIOS Setup. In to the setup, there must be the Advanced section where you can find the Boot Order in a menu. In to the boot order, you will see all available start options and you should move HDD (SATA 0) at the top as first start choice. and then save and exit.
Do not change other settings because your laptop might not start on the next boot. Check this video, even is in Indian, but you will get a better idea.
https://www.youtube.com/watch?v=LKp7NDKDEMg
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MAS (MVE)EE Solution GuideCommented:
Hi afacts
I always create 3 partitions
1st partition for OS (with minimum 250GB)
2nd partition for Database
3rd partition for logs

Thanks
MAS
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Casey WeaverNetwork EngineerCommented:
Separate drives make for easier resizing, management, and recovery in a disaster recovery scenario. For example, if the OS drive disk gets corrupted, or the OS won't boot, you can mount the virtual disks with logs and databases intact to a new OS as part of your recovery. It just helps give you more options in any given situation.
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8046586Commented:
If you have enough space on the SSD, for best performance keep the database on a separate physical disk.
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DanNetwork EngineerAuthor Commented:
The server is virtualized. I can specify on what disks I want the data to reside, so yes, I will have the database and logs reside on the SSD's.
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Gaurav SinghSolution ArchitectCommented:
I would recommed below configuration with 4 Disk:

1 - OS drive
2 - PageFile Systems
3 - Database Drive
4 Log Drive
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DanNetwork EngineerAuthor Commented:
It seems that having a sep. disk for page file, isn't that unnecessary?  Isn't it more complicated, would the only file be the page file on that disk?  Isn't that a waste, I don't know, I'm just asking the questions?
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Gaurav SinghSolution ArchitectCommented:
Well, that the configuration recommended by Microsoft. I did few installations and MS was there for configuration and best practices.  It should only be Pagefile disk no other data on that drive
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8046586Commented:
Page file depends on the disk speed. It is religious that page file has to be on a separate disk, in the past different partition. For the spinning disk is scientifically proven that best performance you will get if you have page file at the beginning of the disk because heads have the shortest path write and read.
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DanNetwork EngineerAuthor Commented:
So how do I configure windows to only write the page file  on a separate disk?
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DanNetwork EngineerAuthor Commented:
The other question is, how. If so I make the HD size for the pagefile?
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8046586Commented:
Calculate at least twice bigger than the RAM you have.
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Gaurav SinghSolution ArchitectCommented:
Right Bocevski Nikola , you need to make disk double of your RAM of the server. If RAM is 16 GB , Make Drive Size to 32 GB and you need to disable Pagefile configuration on other disk, enable it on the Pagefile drive you will be making.
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DanNetwork EngineerAuthor Commented:
Got it, so let's say I have drive 1, the is drive and drive 2, the pagefile drive, can I configure windows to actually store the pagesys file on drive 2?
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8046586Commented:
I mentioned in the comment above. If you are using spinning drive than the best result is when the page file is at the beginning of the drive. In that case, the second drive should be on a separate HDD which is blank (formatted), create the partition for the page file fist, then for the rest you are planning to host on that HDD.
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DanNetwork EngineerAuthor Commented:
The problem is, with the scale computing system I'm on, I can't tell it on what drive to put the data on, it does that automatically and it doesn't let me make that change.  It does give me the option to specify the priority of a VM, so the more priority I give it, it will put most of the data on an SSD,  but it does not put the entire VM  on an ssd.  Basically the system manages which data blocks are used most and it puts that data on SSD.
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DanNetwork EngineerAuthor Commented:
thanks for the input guys.
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