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Backup & Resilience

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Articles, guides and practical notes about Backup & Resilience, with useful context on what matters, how it works and where the interesting details are.

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Latest in Backup & Resilience

Azure SQL LTR backups can now be time-immutable for new restore points — but only after the policy is enabled and locked

Time-based backup immutability is now available for Azure SQL Database LTR backups: once the policy is enabled and locked, protected backups can’t be deleted or modified until the retention window ends. But it only covers backups created after the lock.

> MORE IN BACKUP & RESILIENCE

How Much Does Azure Disaster Recovery Really Cost?
Backup & Resilience

How Much Does Azure Disaster Recovery Really Cost?

Azure Site Recovery is not a single line item you can read off a pricing page and forget about. The licence is only part of the bill. Storage, transactions, outbound data transfer, test failovers and the way you architect recovery all affect the real Azure disaster recovery cost.

Proxmox VE 9 in the Enterprise: What I Would Check Before Migrating
Backup & Resilience

Proxmox VE 9 in the Enterprise: What I Would Check Before Migrating

Proxmox VE 9 is a meaningful release for enterprise virtualisation, but it is not a free lunch. Before you migrate, check storage behaviour, cluster compatibility, backup integration, firmware, and whether your operational model fits a Debian-based platform with a faster-moving release cadence.

Immutable long-term retention is available for Azure SQL Database LTR, but not for Azure SQL Managed Instance LTR in the same way
Backup & Resilience

Immutable long-term retention is available for Azure SQL Database LTR, but not for Azure SQL Managed Instance LTR in the same way

Microsoft’s new time-based immutability for Azure SQL Database long-term retention backups makes them non-modifiable and non-erasable during the immutability period. That strengthens the trustworthiness of recovery points, but teams still need recovery discipline and tested restores—especially for Managed Instance.

Microsoft extends Instant Access snapshots for Azure managed disks: what changes for DR and recovery runbooks
Backup & Resilience

Microsoft extends Instant Access snapshots for Azure managed disks: what changes for DR and recovery runbooks

Microsoft’s Instant Access snapshots for Azure Ultra Disk and Premium SSD v2 change the restore story in a small but operationally important way: snapshots can be used immediately for rapid disk creation before the background copy finishes, then later settle into standard durable snapshot storage. For teams designing backup, DR, and environment-refresh workflows, that reduces waiting time — but it does not remove the need to think carefully about durability, region-copy behaviour, and failure domains.

Why Your Backup Is Not Yet a Disaster-Recovery Strategy
Backup & Resilience

Why Your Backup Is Not Yet a Disaster-Recovery Strategy

Backups are essential, but they are not the same thing as recovery. A proper disaster-recovery strategy has to cover restore time, alternate systems, access control, testing, and the ugly reality of ransomware, regional outages and human error.