The Geek Fix

Fixes from a Geek

Category: Uncategorized

How to Replace a Hard Drive In a Raid 5 via Ubuntu

Unfortunately I started receiving errors saying that one of the drives in my raid 5 (google exact error message) was messed up.  It held up for quite a while and it was time for an upgrade anyways.  Here are the steps I used to replace a drive within in my raid.

Determine which drive is failing

1. Since I didn’t label the drives I have to check the serial numbers to determine which one is faulty.  So I first installed hdparm. (If you want to get some SMART statistics then I would look into smartmontools)

sudo apt-get install hdparm

2. Once hdparm is installed you can run the command below.  It will list out all the serial numbers for the drives that are currently installed in your system:

hdparm -i /dev/sd? | grep SerialNo

Model=WDC WD5000BEVT-22A0RT0, FwRev=01.01A01, SerialNo=WD-WX20AA92XXXX
  Model=WDC WD20EFRX-68AX9N0, FwRev=80.00A80, SerialNo=WD-WMC1T133XXXX
  Model=WDC WD20EFRX-68AX9N0, FwRev=80.00A80, SerialNo=WD-WMC30059XXXX
  Model=WDC WD80EMAZ-00WJTA0, FwRev=83.H0A83, SerialNo=2SG4XTVW

2. Write down the serial number of the drive that needs to be replaced

3. Verify that the raid drive matches the serial number by replacing the ? with the drive letter

hdparm -i /dev/sdb | grep SerialNo

Model=WDC WD20EFRX-68AX9N0, FwRev=80.00A80, SerialNo=WD-WMC1T1XXXXXX

4. List the drives in the raid:

 thegeekfix@nas:~$ cat /proc/mdstat
  Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
  md0 : active raid5 sdc1[2] sdb1[1] sdd1[3]
   3906763776 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]

5. Once you have verified the serial number of the drive you can mark it as failed and then remove it from the raid with the following command:

mdadm --manage /dev/md0 --fail /dev/sde1
mdadm --manage /dev/md0 --remove /dev/sde1

Adding the new drive

  1. After replacing the hard drive you’ll want to double check that the system is able to read it.
    hdparm -i /dev/sdb | grep SerialNo
  2. Next, you’ll want to partition it.
    parted -a optimal /dev/sde 
  3. Finally, add it to the raid.
    mdadm --manage /dev/md0 --add /dev/sde1
  4. Depending on how much data you have it can take a couple of hours.  You can view the progress by using the following command:
    cat /proc/mdstat
  5. If you are replacing all the drives then you will have to partition and add each one to the raid one at a time.

Growing your raid

In my instance I decided to just replace all of the hard drives with larger ones (2tb -> 8tb) as I was running out of space anyways.  After replacing, partitioning, and adding each drive one by one it was time to expand the raid.  Here is how I did it:

  1. I came across some information noting that it is strongly recommended to remove the bitmap prior to expanding so I executed the following commands.  Also note that this process can take a couple of hours depending on how large your raid will be:
    mdadm --grow /dev/mdX --bitmap none
    mdadm --grow /dev/mdX --size=max
    mdadm --wait /dev/mdX
    mdadm --grow /dev/mdX --bitmap internal
  2. Once that completes you should be able to see your expanded raid by simply typing the following command.

df

How to Sideload APK’s to Oculus Quest on Mac

sideload

Are you wanting to sideload some APK’s on your Oculus Quest?  Read on for instructions for Mac.

Continue reading

How to Play SteamVR on the Oculus Quest using ALVR

oculus-quest-fov

I came across an interesting post on Reddit earlier today saying that it was possible to play SteamVR with the Oculus Quest using an application called ALVR.  I decided to give it a try today and these are the steps to install ALVR.

Continue reading

Windows Mixed Reality H0002000-0 Error

mixed_reality

How I fixed the H0002000-0 error in Mixed Reality Portal for Windows Mixed Reality Headsets.

Continue reading

Cemu LoZ: Wind Waker HD Reduced Bloom

cemu_wind_waker3

This graphic pack will make Legend of Zelda: Wind Waker HD for Cemu a little more clear.

Continue reading

Cemu LoZ: Wind Waker HD High Resolution Shadows

cemu_wind_waker2

Improve shadows in LoZ: Wind Waker HD on Cemu with the high resolution shadow graphics pack.

Continue reading

ASUS Prime X370-Pro Ryzen Buyer Beware

Asus Prime X370 Pro

Asus Prime X370-Pro Ryzen Motherboard

ASUS Prime X370-Pro AMD Ryzen motherboard might be the issue!!!

Continue reading

Attaching Files as an Attachment or within the Body in Outlook

general_tech_support

So I’ve always wondered why sometimes attachments wouldn’t add as one would expect, as an attachment, versus sometimes being embedded within the email.  After some digging around I was finally able to determine how to accomplish both.  By simply switching an option within Outlook it can be accomplished.

Continue reading

How to get the Jetpack Plugin to Work with Namecheap Hosting

namecheap + jetpack

For the longest time I had issues with getting the Jetpack plugin to work with my website as most of you are probably experiencing.  I found a few solutions online regarding editing the htcaccess file, but no matter what I did I wasn’t able to figure out what was going on.  Finally I just decided to contact my host, Namecheap, and see if they could resolve my issue.

Continue reading

© 2020 The Geek Fix

Theme by Anders NorenUp ↑