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QEMU built-in RAM block device

From: Валентин
Subject: QEMU built-in RAM block device
Date: Thu, 27 Jul 2023 21:02:40 +0300

Hello and thank you for QEMU! 
Could someone point me to right direction, is there a RAM block device in QEMU? 
I'd like to create temporary RAM drive – without formatting or anything, just simply mount piece of memory as HDD, similarly to raw img files. 
So that guest would see it as normal physical disk. 
I tried: 
-object memory-backend-ram,size=32M,id=m0 -device ide-hd,drive=m0 

But it obviously does not work. 
It could be useful for users without root privileges who are not able to mount system-wide RAM disk and put Qcow image there. 
Thanks in advance, 

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