[BUG] Cowork

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Now I can see clearly what's happening. Look at lines 57-58 in the coworkd-user.log — the VM is successfully mounting drives C, D, E, G, T, and Z as Plan9 shares. The T: drive is being shared directly into the VM just fine.
This means the disk error you're seeing is not a drive letter or mounting problem at all — that's working. The issue is something else happening when Cowork tries to set up the actual session folder within that structure.
Notice line 38: user recovery complete: recovered=0 skipped=1 failed=0 — that skipped=1 is interesting. Something is being skipped during session recovery every single time.
At this point I think you've genuinely hit a platform-level bug that's above what we can troubleshoot from the logs alone. Here's what I'd recommend:
File a bug report with Anthropic at github.com/anthropics/claude-code/issues and include both of these log files. The key details to mention:

"Disk error / reading or writing the session folder failed" on every attempt
T: drive involved (dedicated 5TB drive)
VM boots and mounts all drives successfully per logs
skipped=1 appearing in user recovery on every boot
Tried symlink workaround from C: → T:, same result

The logs show everything working right up until the session folder handoff, which points to a bug on Anthropic's end. With these logs attached, their team should be able to pinpoint it quickly.

What Should Happen?

It should allow me to create a cowork folder that I can use.

Error Messages/Logs

Disk error
Reading or writing the session folder failed. Check disk space and permissions, then try again.

Steps to Reproduce

Attempting to create a CoWork Project for the first time.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

This is my first time using Claude. I just joined yesterday.

Claude Code Version

The Claude Desktop app version shown in your logs is 1.9659.2.0. For the GitHub bug report, here's a quick summary of the relevant version info: Claude Desktop: 1.9659.2.0 Claude model: Claude Sonnet 4.6 (claude-sonnet-4-6) SDK version: 2.1.156

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_