for index, disk := range disks {
			if disk == OfflineDisk {
				continue
			}
			tillOffset := erasure.ShardFileOffset(offset, readLen, length)
			bitrotReaders[index] = newStreamingBitrotReader(disk, nil, "testbucket", "object", tillOffset, DefaultBitrotAlgorithm, erasure.ShardSize())
		}
		_, err = erasure.Decode(t.Context(), buf, bitrotReaders, offset, readLen, length, nil)
		closeBitrotReaders(bitrotReaders)