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How is a WORM retention period counted in QuTS Hero and QES?

Hvordan tælles en WORM-opbevaringsperiode i QuTS hero og QES?

Last modified date: 2024-08-08

Applicable Products

QuTS hero, QES

Background

WORM (write once read many) technology ensures that once data is written, its state remains unchanged. The data cannot be deleted or modified, effectively locking the data state. WORM is primarily used for long-term data preservation or compliance applications, as well as for cybersecurity protection against ransomware encryption.

One of the WORM settings you can configure is the WORM retention period. This period determines how long WORM applies to the files and folders in a WORM shared folder.

Details

A WORM retention period is not based on system time, but instead based on the uptime of the storage pool that contains the WORM shared folder.

Each storage pool has its own WORM clock that determines when a WORM retention period ends. The following situations may pause the WORM clock:

Shutting down the system
Restarting the system
Detaching the storage pool
Detaching a disk in the storage pool
Detaching the enclosure that contains the storage pool
Locking the storage pool if the pool is an SED secure storage pool
Updating the NAS firmware
When the number of abnormal disks in the storage pool's RAID group exceeds the RAID group's disk failure tolerance

When any of the above events occurs, the WORM clock automatically pauses. The WORM clock only resumes when the interrupting event ends or returns to a normal state. However, due to the pause, the WORM retention period would end up finishing later than the specified duration.

Note

The system time does not affect the WORM clock. Changing the system time will not lengthen or shorten the retention period.

Example

A WORM shared folder is created with the retention period set to 3 days (72 hours).
A file is added to the WORM shared folder on Monday 18:00.
- If there are no events that cause the WORM clock to pause, the WORM retention period for the file would be expected to end after 72 hours on Thursday 18:00.
The NAS shuts down on Tuesday 01:00.
- The WORM clock pauses.
The NAS starts up on Tuesday 06:00.
- The WORM clock resumes.
- The last 5 hours are not counted as part of the WORM retention period for the file.
No further events cause the WORM clock to pause.
The WORM retention period for the file ends on Thursday 23:00.
- The file can now be modified or deleted.
- The end time is 77 hours after Monday 18:00 when the file was added to the WORM shared folder.
- The 77 hours include:
  - 72 hours that the WORM clock counted when the NAS was running
  - 5 hours that the WORM clock paused when the NAS was shut down

WORM Limitations

WORM can only be enabled during shared folder creation.
WORM cannot be enabled or disabled after shared folder creation.
WORM settings cannot be modified after shared folder creation, except for the following:
- The WORM retention period can only be modified after shared folder creation if the WORM type is set to "Enterprise".
When cloning from a snapshot of a WORM shared folder, WORM will be disabled in the new shared folder.
The WORM settings of the original shared folder are not cloned to the new shared folder.

Anvendelige Produkter

QuTS hero , QES

Baggrund

WORM (write once read many) teknologi sikrer, at når data er skrevet, forbliver dens tilstand uændret. Dataene kan ikke slettes eller ændres, hvilket effektivt låser datatilstanden. WORM bruges primært til langtidsdataopbevaring eller overholdelsesapplikationer, samt til cybersikkerhedsbeskyttelse mod ransomware-kryptering.

En af de WORM-indstillinger, du kan konfigurere, er WORM-opbevaringsperioden. Denne periode bestemmer, hvor længe WORM gælder for filerne og mapperne i en WORM-delt mappe.

Detaljer

En WORM-opbevaringsperiode er ikke baseret på systemtid, men i stedet baseret på oppetiden for Lager -poolen, der indeholder den WORM-delte mappe.

Hver Lager -pool har sit eget WORM-ur, der bestemmer, hvornår en WORM-opbevaringsperiode slutter. Følgende situationer kan sætte WORM-uret på pause:

Lukning af systemet
Genstart af systemet
Frakobling af Lager -poolen
Frakobling af en disk i Lager -poolen
Frakobling af kabinettet, der indeholder Lager -poolen
Låsning af Lager -poolen, hvis poolen er en SED-sikker Lager -pool
Opdatering af NAS Firmware
Når antallet af unormale diske i Lager -poolens RAID-gruppe overstiger RAID-gruppens diskfejltolerance

Når nogen af ovenstående hændelser opstår, sættes WORM-uret automatisk på pause. WORM-uret genoptages kun, når den afbrydende hændelse slutter eller vender tilbage til en normal tilstand. På grund af pausen vil WORM-opbevaringsperioden dog ende med at slutte senere end den angivne varighed.

Bemærk

Systemtiden påvirker ikke WORM-uret. Ændring af systemtiden vil ikke forlænge eller forkorte opbevaringsperioden.

Eksempel

En WORM-delt mappe oprettes med en opbevaringsperiode indstillet til 3 dage (72 timer).
En fil tilføjes til den WORM-delte mappe mandag kl. 18:00.
- Hvis der ikke er nogen hændelser, der får WORM-uret til at sætte på pause, forventes WORM-opbevaringsperioden for filen at slutte efter 72 timer torsdag kl. 18:00.
NAS'en lukker ned tirsdag kl. 01:00.
- WORM-uret pauses.
NAS'en starter op tirsdag kl. 06:00.
- WORM-uret genoptages.
- De sidste 5 timer tælles ikke som en del af WORM-opbevaringsperioden for filen.
Ingen yderligere hændelser får WORM-uret til at pause.
WORM-opbevaringsperioden for filen slutter torsdag kl. 23:00.
- Filen kan nu ændres eller slettes.
- Sluttiden er 77 timer efter mandag kl. 18:00, hvor filen blev tilføjet til WORM-delte mappen.
- De 77 timer inkluderer:
  - 72 timer, som WORM-uret talte, da NAS'en kørte
  - 5 timer, som WORM-uret paused, da NAS'en var lukket ned

WORM-begrænsninger

WORM kan kun aktiveres under oprettelsen af den delte mappe.
WORM kan ikke aktiveres eller deaktiveres efter oprettelsen af den delte mappe.
WORM-indstillinger kan ikke ændres efter oprettelsen af den delte mappe, bortset fra følgende:
- WORM-opbevaringsperioden kan kun ændres efter oprettelsen af den delte mappe, hvis WORM-typen er sat til "Enterprise".
Når der klones fra en Snapshot af en WORM-delt mappe, vil WORM blive deaktiveret i den nye delte mappe.
WORM-indstillingerne for den oprindelige delte mappe klones ikke til den nye delte mappe.

Yderligere læsning

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