File Storage · head to head
Ceph vs CrystalDiskInfo
Ceph
File Storage
Open source distributed storage providing object, block and file from one cluster
- From
- Free
- Rated
- -
CrystalDiskInfo
Utilities
Free Windows tool that reads S.M.A.R.T. data from drives and warns before they fail
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Ceph ceph assumes an operator who understands placement groups, CRUSH rules and recovery tuning, so organisations without dedicated storage staff routinely end up with a cluster that works until the first failure and then does not.; CrystalDiskInfo many USB enclosures do not pass S.M.A.R.T. commands through, so external drives often report nothing at all and users read that as a healthy result.
- They diverge on capability: Ceph covers RADOS object store, CrystalDiskInfo covers S.M.A.R.T. reporting.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Ceph and CrystalDiskInfo actually diverge.
| Attribute | Ceph | CrystalDiskInfo |
|---|---|---|
| Platforms | Linux | Windows |
| Category | File Storage | Utilities |
Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Ceph
- RADOS object store
- RADOS Gateway
- RBD block devices
- CephFS
- CRUSH placement
- Erasure coded pools
Only in CrystalDiskInfo
- S.M.A.R.T. reporting
- NVMe support
- Threshold alerts
- Temperature monitoring
- Standard and Shizuku editions
- MIT licensed
What people use each for
The jobs each tool is most often brought in to do.
Ceph
- Backing a private cloud where virtual machine disks, shared filesystems and an S3 endpoint all need the same hardwarenot CrystalDiskInfo
- Growing past the point where a proprietary array upgrade costs more than a rack of commodity serversnot CrystalDiskInfo
- Research and media environments with petabytes of data and staff who can operate storagenot CrystalDiskInfo
- Providing an S3 endpoint on premises with multi site replication under your own controlnot CrystalDiskInfo
CrystalDiskInfo
- Checking the true condition of a second-hand drive before trusting data to itnot Ceph
- Watching SSD endurance on write-heavy machines such as build servers and video workstationsnot Ceph
- Getting early warning of mechanical failure while a backup can still be takennot Ceph
- Auditing power-on hours and wear across a small fleet of machines one at a timenot Ceph
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Ceph
- Ceph assumes an operator who understands placement groups, CRUSH rules and recovery tuning, so organisations without dedicated storage staff routinely end up with a cluster that works until the first failure and then does not.
- Small clusters are inefficient: three way replication means a third of raw capacity is usable, and erasure coding needs enough failure domains to be safe, so the economics only work above a certain size.
- Recovery and rebalancing generate heavy internal traffic, so a failed disk can degrade client latency across the cluster unless backfill is throttled correctly beforehand.
- Upgrades must follow a strict daemon order across monitors, managers, OSDs and gateways, and a mistake in that order on a live cluster is difficult to reverse.
- Because it is self hosted, every byte served to the internet is transit you pay for on your own links, so the free licence does not mean free egress and bandwidth planning becomes your problem rather than the providers.
CrystalDiskInfo
- Many USB enclosures do not pass S.M.A.R.T. commands through, so external drives often report nothing at all and users read that as a healthy result.
- It is Windows only, and there is no central console, so checking a fleet means visiting each machine or scripting an alternative.
- A good status is not a prediction: drives fail suddenly with clean attributes, and treating the summary as an assurance leads people to skip backups.
- The Shizuku edition ships anime artwork and voice packs, which is unsuitable on company machines and is often downloaded by mistake because it is the more visible option.
- Vendors define raw attribute values inconsistently, so the same number means different things on different drives and the detailed view needs interpretation to be useful.
Pricing, plan by plan
Ceph
Free- CephFree
- Full functionality, no capacity limit
- Object, block and file interfaces
- Community support via mailing list and Slack
CrystalDiskInfo
Free- CrystalDiskInfoFree
- MIT licensed
- Commercial use permitted
- All features in the free download
Which should you pick?
Choose Ceph if
- You need rados object store.
- You want to start without paying.
- You work on Linux.
- You also want rados gateway.
Choose CrystalDiskInfo if
- You need s.m.a.r.t. reporting.
- You want to start without paying.
- You work on Windows.
- You also want nvme support.
Questions people ask
- Is Ceph or CrystalDiskInfo better?
- Neither clearly leads. Ceph starts at Free and CrystalDiskInfo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Ceph or CrystalDiskInfo?
- Ceph starts at Free and CrystalDiskInfo at Free.
- Does Ceph or CrystalDiskInfo run on more platforms?
- Ceph runs on Linux. CrystalDiskInfo runs on Windows.
- Can I use Ceph for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Ceph best used for?
- Ceph is most often used for backing a private cloud where virtual machine disks, shared filesystems and an s3 endpoint all need the same hardware, growing past the point where a proprietary array upgrade costs more than a rack of commodity servers, research and media environments with petabytes of data and staff who can operate storage, providing an s3 endpoint on premises with multi site replication under your own control. Of those, backing a private cloud where virtual machine disks, shared filesystems and an s3 endpoint all need the same hardware and growing past the point where a proprietary array upgrade costs more than a rack of commodity servers are not what CrystalDiskInfo is typically brought in for.
- What can Ceph do that CrystalDiskInfo cannot?
- Ceph covers RADOS object store, RADOS Gateway, RBD block devices, CephFS. CrystalDiskInfo covers S.M.A.R.T. reporting, NVMe support, Threshold alerts, Temperature monitoring.
Answered from the vendors’ own pages
Ceph: How many nodes do I need to start?
Three is the practical minimum for a replicated cluster with real fault tolerance, and most production advice starts at five once you account for maintenance windows.
CrystalDiskInfo: Can I use it in a business?
Yes. It is MIT licensed with no personal-use restriction, which distinguishes it from several other free Windows utilities.
Ceph: Is it faster than a SAN?
Not on single stream latency. It wins on aggregate throughput and on growing without a forklift upgrade, which is a different property from raw speed.
CrystalDiskInfo: Why does my external drive show no data?
Most USB bridge chips do not pass S.M.A.R.T. commands through. Connecting the drive directly by SATA or NVMe usually reveals the attributes.
Ceph: Can I buy support?
Yes. IBM sells IBM Storage Ceph and SUSE and others have offered supported builds; the upstream project itself is free.
CrystalDiskInfo: Does a caution status mean I should replace the drive immediately?
It means an attribute has crossed a vendor threshold, most often reallocated sectors. Back up now, then decide. It is a warning, not a countdown.
Ceph: Should I use it just for S3?
If object is all you need, a dedicated object store is simpler to run. Ceph earns its complexity when you need block and file as well.
CrystalDiskInfo: What is the difference between the editions?
Function is identical. The Shizuku edition adds themed artwork and voice packs; the standard edition is the plain one you want on a work machine.
Related pages
More on CrystalDiskInfo
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