Thicket data repository for the EEG
anil.recoil.org
1{
2 "id": "https://www.tunbury.org/2025/03/27/dell-poweredge-r640",
3 "title": "Dell PowerEdge R640 Storage Server",
4 "link": "https://www.tunbury.org/2025/03/27/dell-poweredge-r640/",
5 "updated": "2025-03-27T00:00:00",
6 "published": "2025-03-27T00:00:00",
7 "summary": "We have received our first batch of 7.68TB Kingston SSD drives for deployment in some Dell PowerEdge R640 servers, which will be used to create a large storage pool.",
8 "content": "<p>We have received our first batch of 7.68TB Kingston SSD drives for deployment in some Dell PowerEdge R640 servers, which will be used to create a large storage pool.</p>\n\n<p>The first job was to mount each of the drives in a caddy.</p>\n\n<p><img alt=\"\" src=\"https://www.tunbury.org/images/kingston-with-caddy.png\"></p>\n\n<p>And then install them in the server.</p>\n\n<p><img alt=\"\" src=\"https://www.tunbury.org/images/kingston-in-slot.png\"></p>\n\n<p>These R640 servers are equipped with the Dell PERC H740P RAID controller. They support either hardware RAID 0,1,5,10,50 etc or Enhanced HBA mode.</p>\n\n<p><img alt=\"\" src=\"https://www.tunbury.org/images/r640-enhanced-hba.png\"></p>\n\n<p>In eHBA mode, the disks operate in a passthrough mode, presenting the raw disks to the OS, however each disk needs to be specifically selected in an additional step after enabling eHBA mode.</p>\n\n<p><img alt=\"\" src=\"https://www.tunbury.org/images/r640-jbod.png\"></p>\n\n<p>In RAID mode, one or more virtual disks need to be created to present the disks to the OS. Preconfigured profiles are available to complete this step easily.</p>\n\n<p><img alt=\"\" src=\"https://www.tunbury.org/images/r640-raid5.png\"></p>\n\n<p>We will run these with a ZFS file system, so need to decide on whether we want to use the hardware RAID features or follow the advice on Wikipedia on the <a href=\"https://en.wikipedia.org/wiki/ZFS#Avoidance_of_hardware_RAID_controllers\">Avoidance of hardware RAID controllers</a>. Online opinion is divided. My summary is that hardware RAID will be easier to manage when a disk fails, but ZFS on the raw disks will have some integrity advantages.</p>",
9 "content_type": "html",
10 "author": {
11 "name": "Mark Elvers",
12 "email": "mark.elvers@tunbury.org",
13 "uri": null
14 },
15 "categories": [
16 "Dell",
17 "tunbury.org"
18 ],
19 "source": "https://www.tunbury.org/atom.xml"
20}