I/O error during "unlink" operation for file

[Marcel Zawadzki]

Hi,

recently we found this log in firebird.log. It does not seem to affect the availability of the database, but we'd like to know to source of it appearing:

Xenofont-Krk    Fri Sep 19 21:22:42 2025
        Database: /var/local/baza/DATABASE.gdb
        I/O error during "unlink" operation for file "/var/local/baza/DATABASE.gdb  "
        Error while trying to delete file
        Permission denied

As far as we can understand that the firebird maybe tried to delete the database file or some file related to it (like tmp file, idk). That's kind of concerning for us. Please let me know what could it mean.

Best regards,
Marcel

[Marcel Zawadzki]

Additional info:
OS: Debian GNU/Linux 12.2

Firebird: 3.0.11 x64

[Alexey Kovyazin]

Hello,

Is it VM?

df -Th

Regards,

Alexey Kovyazin

[Marcel Zawadzki]

Hi, 

Yes, it is a VM running on Hyper-V.

root@Xenofont-Krk:/var/local# hostnamectl

Static hostname: Xenofont-Krk

Icon name: computer-vm

Chassis: vm 🖴

Machine ID: 17515c71687640059fcaaee54fdd5e94

Boot ID: b21fc583a53b471abdbc270520094c16

Virtualization: microsoft

Operating System: Debian GNU/Linux 12 (bookworm)

Kernel: Linux 6.1.0-13-amd64

Architecture: x86-64

Hardware Vendor: Microsoft Corporation

Hardware Model: Virtual Machine

Firmware Version: Hyper-V UEFI Release v4.1 

root@Xenofont-Krk:/var/local# df -Th

System plików Typ rozm. użyte dost. %uż. zamont. na

udev devtmpfs 7,8G 0 7,8G 0% /dev

tmpfs tmpfs 1,6G 2,6M 1,6G 1% /run

/dev/sda2 ext4 62G 40G 19G 69% /

tmpfs tmpfs 7,9G 0 7,9G 0% /dev/shm

tmpfs tmpfs 5,0M 0 5,0M 0% /run/lock

/dev/sda1 vfat 511M 5,9M 506M 2% /boot/efi

/dev/sdc1 ext4 63G 12G 48G 20% /var/local/kopie

/dev/sdb1 ext4 63G 6,6G 53G 11% /var/local/baza

tmpfs tmpfs 1,6G 0 1,6G 0% /run/user/1001

Best regards,

Marcel

[Marcel Zawadzki]

root@Xenofont-Krk:/var/local# hostnamectl
Static hostname: Xenofont-Krk
Icon name: computer-vm
Chassis: vm 🖴
Machine ID: 17515c71687640059fcaaee54fdd5e94
Boot ID: b21fc583a53b471abdbc270520094c16
Virtualization: microsoft
Operating System: Debian GNU/Linux 12 (bookworm)
Kernel: Linux 6.1.0-13-amd64
Architecture: x86-64
Hardware Vendor: Microsoft Corporation
Hardware Model: Virtual Machine
Firmware Version: Hyper-V UEFI Release v4.1

root@Xenofont-Krk:/var/local# df -Th
System plików Typ rozm. użyte dost. %uż. zamont. na
udev devtmpfs 7,8G 0 7,8G 0% /dev
tmpfs tmpfs 1,6G 2,6M 1,6G 1% /run
/dev/sda2 ext4 62G 40G 19G 69% /
tmpfs tmpfs 7,9G 0 7,9G 0% /dev/shm
tmpfs tmpfs 5,0M 0 5,0M 0% /run/lock
/dev/sda1 vfat 511M 5,9M 506M 2% /boot/efi
/dev/sdc1 ext4 63G 12G 48G 20% /var/local/kopie
/dev/sdb1 ext4 63G 6,6G 53G 11% /var/local/baza
tmpfs tmpfs 1,6G 0 1,6G 0% /run/user/1001

[Alexey Kovyazin]

Hello,

In case if VM, thsi error can be due to operations like VM resize, suspend, etc. 

Monitor logs. 

Regards, 

Alexey Kovyazin 

чт, 16 окт. 2025 г., 10:34 Marcel Zawadzki <m.zawadzki...@gmail.com>:

--
Support the ongoing development of Firebird! Consider donating to the Firebird Foundation and help ensure its future. Every contribution makes a difference. Learn more and donate here:
https://www.firebirdsql.org/donate
---
You received this message because you are subscribed to the Google Groups "firebird-support" group.
To unsubscribe from this group and stop receiving emails from it, send an email to firebird-suppo...@googlegroups.com.
To view this discussion, visit https://groups.google.com/d/msgid/firebird-support/d50451c8-6b2c-4266-a8bf-b01eb7055d98n%40googlegroups.com.