Skip to content
View in the app

A better way to browse. Learn more.

Unraid

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Unable to write to cache

Featured Replies

Today, I was performing 2 simultaneous 'moves' of files between shares, via my windows PC.  The move halted.

 

Edit: the current status is that I cannot write anything to the cache.

 

I ran "Fix Common Problems" with the result being "Unable to write to cache".    (Drive mounted read-only or completely full.).

 

In response I updated to V.7.00 from 6.12 (?).  no change.

I had made no changes to the Unraid system and had had an uptime of over a month prior to the update. 

 

Please help.

 

 

 

supernova-diagnostics-20250110-1952.zip

Edited by FishStink
Clarification

  • Community Expert

Looks like a connection problem with cache. Check connections, both ends, data and power, including splitters.

  • Author

I checked the connections. Everything is secure and well connected. The dashboard shows that everything is running ok.

 

Is there anything else that I can do ?

Edited by FishStink

  • Author

Attached is the new diagnostics.  I also note that:

1. Edit: In the "Shares" section, it reads as "There are no exportable user shares"  My shares have been deleted

2. Docker service failed to start

Edit: 3. the owner in each of the Media shares is now set to be "nobody", see image below

 

image.thumb.png.01f1b70772e4a3fc31ccbd560fe273dd.png

Thanks for your help in advance.

 

image.png.3cefb07c918eab7bb1d3ae7f53236126.png

supernova-diagnostics-20250111-1144.zip

Edited by FishStink

  • Community Expert

Still having connection problems with cache.

  • Author
5 hours ago, trurl said:

Still having connection problems with cache.

 I have gone back 3 times now and checked all of the connections.  This box has not been moved physically an inch in 6 months and has been assembled as it is for 18 months. 

 

What can I try next ?

  • Community Expert

Swap cables, both power can SATA, between the SSD and one of the disks, and retest.

  • Community Expert
On 1/11/2025 at 12:28 PM, trurl said:

Still having connection problems with cache.

 

Just so satisfy my curiosity, when you swapped sata cables how did you do it. Did you just unplug the sata cable from the hdd and plug it into the ssd or did you swap it on the motherboard too? If you swapped the cables at both the drives and motherboard there's a slim chance maybe you have a bad sata port on the motherboard. If you just swapped them at the drives then I'd assume your ssd is failing regardless of what SMART says. Either way if I was having this issue I'd backup my cache drive to the array if possible.

  • Community Expert

It's still using the same SATA port, worth trying a different one, if issues remain, replace the SSD.

  • Author

The data on the Cache Drive is unimportant to me.  Can you advise me how I can safely remove it from the unread operation.

  • Community Expert
17 minutes ago, FishStink said:

The data on the Cache Drive is unimportant to me.  Can you advise me how I can safely remove it from the unread operation.

Do you mean you want to run with only the array and without cache or any other pools?

14 hours ago, FishStink said:

The data on the Cache Drive is unimportant to me.  Can you advise me how I can safely remove it from the unread operation.

Assuming there's no important stuff like appdata or system shares on it I think you can just stop the array, click on the cache and remove pool.

Edited by lovaan

  • Author
On 1/15/2025 at 8:34 PM, lovaan said:

Assuming there's no important stuff like appdata or system shares on it I think you can just stop the array, click on the cache and remove pool.

Apologies in the delay.  Yes, there is no important stuff on the cache. 

I've gone ahead and removed the Cache from the pool.

The result is that everything is working fine now.

So what does this tell you?

That the Cache drive is defective ?

or

That there is still something wrong elsewhere (I changed over the power and sata cables ?

 

This motherboard / CPU and RAM is getting a little long in the tooth (likely 13+ years old).

Would you advise switching up ? 

  • Community Expert
16 hours ago, FishStink said:

So what does this tell you?

That the Cache drive is defective ?

Yes OR the SATA port you were using.  Test out your SSD in another PC if possible.

 

 

16 hours ago, FishStink said:

Would you advise switching up ? 

13 years is a long life for a computer.  If it is doing what you need it to do then leave it be.  If not (which sounds to be the case now) Yes, replace it.

  • Community Expert
19 hours ago, FishStink said:

I've gone ahead and removed the Cache from the pool.

The result is that everything is working fine now.

Note that there are good reasons to have some user shares, those related to Dockers/VMs, not on the array. So I would replace it instead of removing it and only running with an array.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.