Mitigating seismic events via highly available volumes

1 . A computer-implemented method for mitigating vibration damage to a distributed storage system, the method comprising:

responsive to detecting that a site is at risk of a vibration event:

classifying drives comprising the distributed storage system located at the site as vulnerable and the drives located at a different site as non-vulnerable drives, wherein the non-vulnerable drives host a plurality of partner volumes comprising copies of a plurality of standard volumes located on the vulnerable drives;

turning off the vulnerable drives;

creating, on the non-vulnerable drives, a thin mitigation layer comprising thin-provisioned volumes associated with the standard volumes;

routing read IO addressed to the standard volumes to the associated partner volumes; and

routing write IO addressed to the standard volumes to the thin-provisioned volumes;

responsive to determining that the site is no longer at risk of a vibration event:

turning on the vulnerable drives; and

copying one or more states from the thin-provisioned volumes to their associated standard volumes.

2 . The method of claim 1 , wherein the distributed storage system employs a tiering process, and wherein the method further comprises:

modifying the tiering process to only migrate data to the non-vulnerable drives.

3 . The method of claim 1 , further comprising:

responsive to turning off the vulnerable drives, temporarily activating one or more of the vulnerable drives in a staggered fashion to execute read/write operations during the vibrational event.

4 . The method of claim 1 , wherein the classifying further comprises classifying at least one of the drives as particularly vulnerable, and wherein the method further comprises:

preventing one or more highly available volumes from using the at least one particularly vulnerable drive for one or more same backend ranges.

5 . The method of claim 1 , further comprising:

responsive to detecting one or more entries in at least one of the thin-provisioned volumes, executing a read IO against the thin-provisioned volume associated with the standard volume to which the read IO was originally addressed.

6 . The method of claim 1 , wherein the routing is facilitated using an asymmetric logical unit access feature.

7 . A computer system for mitigating vibration damage to a distributed storage system, the computer system comprising:

one or more processors, one or more computer readable memories, one or more computer readable storage mediums, and program instructions stored on at least one of the one or more computer readable storage mediums for execution by at least one of the one or more processors via at least one of the one or more memories, wherein the computer system is capable of performing a method comprising:

responsive to detecting that a site is at risk of a vibration event:

classifying drives comprising the distributed storage system located at the site as vulnerable and the drives located at a different site as non-vulnerable drives, wherein the non-vulnerable drives host a plurality of partner volumes comprising copies of a plurality of standard volumes located on the vulnerable drives;

turning off the vulnerable drives;

creating, on the non-vulnerable drives, a thin mitigation layer comprising thin-provisioned volumes associated with the standard volumes;

routing read IO addressed to the standard volumes to the associated partner volumes; and

routing write IO addressed to the standard volumes to the thin-provisioned volumes;

responsive to determining that the site is no longer at risk of a vibration event:

turning on the vulnerable drives; and

copying one or more states from the thin-provisioned volumes to their associated standard volumes.

8 . The computer system of claim 7 , wherein the distributed storage system employs a tiering process, and wherein the method further comprises:

modifying the tiering process to only migrate data to the non-vulnerable drives.

9 . The computer system of claim 7 , further comprising:

responsive to turning off the vulnerable drives, temporarily activating one or more of the vulnerable drives in a staggered fashion to execute read/write operations during the vibrational event.

10 . The computer system of claim 7 , wherein the classifying further comprises classifying at least one of the drives as particularly vulnerable, and wherein the method further comprises:

preventing one or more highly available volumes from using the at least one particularly vulnerable drive for one or more same backend ranges.

11 . The computer system of claim 7 , further comprising:

responsive to detecting one or more entries in at least one of the thin-provisioned volumes, executing a read IO against the thin-provisioned volume associated with the standard volume to which the read IO was originally addressed.

12 . The computer system of claim 7 , wherein the routing is facilitated using an asymmetric logical unit access feature.

13 . A computer program product for mitigating vibration damage to a distributed storage system, the computer program product comprising:

one or more computer readable tangible storage medium and program instructions stored on at least one of the one or more tangible storage medium, the program instructions executable by a processor to cause the processor to perform a method comprising:

responsive to detecting that a site is at risk of a vibration event:

classifying drives comprising the distributed storage system located at the site as vulnerable and the drives located at a different site as non-vulnerable drives, wherein the non-vulnerable drives host a plurality of partner volumes comprising copies of a plurality of standard volumes located on the vulnerable drives;

turning off the vulnerable drives;

creating, on the non-vulnerable drives, a thin mitigation layer comprising thin-provisioned volumes associated with the standard volumes;

routing read IO addressed to the standard volumes to the associated partner volumes; and

routing write IO addressed to the standard volumes to the thin-provisioned volumes;

responsive to determining that the site is no longer at risk of a vibration event:

turning on the vulnerable drives; and

copying one or more states from the thin-provisioned volumes to their associated standard volumes.

14 . The computer program product of claim 13 , wherein the distributed storage system employs a tiering process, and wherein the method further comprises:

modifying the tiering process to only migrate data to the non-vulnerable drives.

15 . The computer program product of claim 13 , further comprising:

responsive to turning off the vulnerable drives, temporarily activating one or more of the vulnerable drives in a staggered fashion to execute read/write operations during the vibrational event.

16 . The computer program product of claim 13 , wherein the classifying further comprises classifying at least one of the drives as particularly vulnerable, and wherein the method further comprises:

preventing one or more highly available volumes from using the at least one particularly vulnerable drive for one or more same backend ranges.

17 . The computer program product of claim 13 , further comprising:

responsive to detecting one or more entries in at least one of the thin-provisioned volumes, executing a read IO against the thin-provisioned volume associated with the standard volume to which the read IO was originally addressed.