E4F3000F: Unexpected VSS writer error.
One or more VSS Writer(s) fail during snapshot creation or VSS does not have sufficient memory resources. This can be verified by running the vssadmin list writers command using command Prompt immediately after backup failure:
Author Name: 'Task Scheduler Writer'
Author ID: {d61d61c8-d73a-4eee-8cdd-f6f9786b7124}
Author Instance ID: {1bddd48e-5052-49db-9b07-b96f96727e6b}
Status: [1] Stable Last error: No errors
Author Name: 'VSS Metadata Store Writer'
Author ID: {75dfb225-e2e4-4d39-9ac9-ffaff65ddf06}
Author Instance ID: {088e7a7d-09a8-4cc6-a609-ad90e75ddc93}
Status: [1] Stable Last error: No errors
Author Name: 'Performance Counters Writer'
Author ID: {0bada1de-01a9-4625-8278-69e735f39dd2}
Author Instance ID: {f0086dda-9efc-47c5-8eb6-a944c3d09381}
Status: [1] Stable Last error: No errors
Author Name: 'System Writer'
Author ID: {e8132975-6f93-4464-a53e-1050253ae220}
Author Instance ID: {d8022aa2-4d61-4956-b50f-d5ec5bfac024}
Status: [7] Failed Last error: Timeout
Author Name: 'SqlServerWriter'
Author ID: {a65faa63-5ea8-4ebc-9dbd-a0c4db26912a}
Author Instance ID: {13b45f65-bafb-4ee5-a850-fe7d582ea0ab}
Status: [7] Failed Last error: Timeout
Author Name: 'ASR Writer'
Author ID: {be000cbe-11fe-4426-9c58-531aa6355fc4}
Author Instance ID: {9938c9fa-8cee-4230-8003-a5da9e8c330e}
Status: [7] Failed Last error: Timeout Author Name: 'Shadow Copy Optimization Writer'
Author ID: {4dc3bdd4-ab48-4d07-adb0-3bee2926fd7f}
Author Instance ID: {a07bac98-9d3a-41c9-8587-2fa204f8dcef}
Status: [7] Failed Last error: Timeout
Author Name: 'MSSearch Service Writer'
Author ID: {cd3f2362-8bef-46c7-9181-d62844cdc0b2}
Author Instance ID: {d7bc0a41-c318-4e9e-9dee-c569f25fe8b4}
Status: [7] Failed Last error: Timeout Author Name: 'WMI Writer'
Author ID: {a6ad56c2-b509-4e6c-bb19-49d8f43532f0}
Author Instance ID: {0a25bbcf-29cc-4551-8edf-341fa2e0cd6b}
Status: [7] Failed Last error: Timeout
Author Name: 'BITS Writer'
Author ID: {4969d978-be47-48b0-b100-f328f07ac1e0}
Author Instance ID: {6cdcebb3-3008-41a3-850c-c2eb65150c20}
Status: [1] Stable Last error: Insufficient resources
Author Name: 'IIS Config Writer'
Author ID: {2a40fd15-dfca-4aa8-a654-1f8c654603f6}
Author Instance ID: {865573d4-ed64-4706-bd6a-8cd46ea1da63}
Status: [7] Failed Last error: Timeout
Author Name: 'Registry Writer'
Author ID: {afbab4a2-367d-4d15-a586-71dbb18f8485}
Author Instance ID: {bad05954-26e3-40c4-9441-91168b34f7f6}
Status: [7] Failed Last error: Timeout
vssadmin list writers command. Re-run the backup job.